tag:blogger.com,1999:blog-73905511272453447922024-03-14T02:30:10.240-07:00Pointe Shoe PhysicsUnknownnoreply@blogger.comBlogger17125tag:blogger.com,1999:blog-7390551127245344792.post-22337525703811563802011-01-23T14:38:00.000-08:002011-01-23T14:38:20.744-08:00Conclusion In this study, I tested the amount of force per square centimeter that is put on a dancer's toes while dancing en pointe. I also tested how this number changes when the dancer is in different positions. My hypothesis was that there would be the most force on a dancer's foot when they are standing on one foot en pointe and that the force would be the least per square centimeter when a dancer is standing flat on two feet.<br />
To test my hypothesis, I traced seventeen dancers' feet in three different positions ( flat, demi-pointe, and full-pointe). I then measured their weight and converted it to Newtons. Next, I drew polygons on the tracings and found their area. I then used the formula (N/cm^2) to find the amount of force per square centimeter for each of the trials. I conducted fifty-one trials with seventeen test subjects.<br />
The average force per square centimeter for the two feet flat position was the least and the average for one foot full-pointe was the greatest. The average force for two flat feet was 1.926371 N, which means that it was the position with the least amount of force. The average force on one fool flat was. 3.852742 N. The average force for two feet in the demi-pointe position (ball of the foot) was 5.932413 N. The average force for one foot in demi-pointe 11.86483 N. The average amount of force for one foot in the full-pointe position was 20.4075 N. One foot in the full-pointe position had the most force: 40.81501 N per square centimeter.<br />
I found that as the area of the position became larger, there was less force per square centimeter. This is because the force is applied to a larger area. That means that there is the least force on flat positions and the most on full-pointe positions. Demi-pointe positions had numbers in between flat and full-pointe. This proved my hypothesis the be correct.Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-7390551127245344792.post-66589124808083231912011-01-23T14:14:00.001-08:002011-01-23T14:14:32.503-08:00Application Dancers are known to "dance through their pain". Because of this, many minor injuries quickly become worse. This information could be used by orthopedic specialists when treating ballet dancers in order to know how much force was repeatedly put on a certain area of the foot.<br />
Another possible application of this study could be to companies who currently make pointe shoes. Traditional pointe shoes have shanks (pieces of hard material that support the arch) made of materials such as leather, cardboard, and burlap. As the shoes are worn, they become softer. When they become too soft, the shoes do not properly support the dancer and may cause injuries. This can take anywhere from six months to one performance, depending on the material of the shoe and frequency of use.<br />
Pointe shoes, which are each handmade, range in price from fifty to one hundred dollars a pair. If the shank were made with a more durable material, they would last longer. Materials scientists could use the information found in this study to find or create a material that would be durable enough to last yet pliable and flexible enough for pointe work.Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-7390551127245344792.post-83977248514883977842011-01-15T15:21:00.001-08:002011-01-23T13:51:37.296-08:00Final Report!I am almost done with my final report! It will be posted under "Documents". To access it, click on the Documents link on the right.<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TTIr6qE8nbI/AAAAAAAAAQ4/jK10cNWGS_4/s1600/750491_56e3_625x1000.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TTIr6qE8nbI/AAAAAAAAAQ4/jK10cNWGS_4/s320/750491_56e3_625x1000.jpg" width="218" /></a></div>Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-7390551127245344792.post-38453077154209855272011-01-13T19:41:00.000-08:002011-01-13T19:41:53.083-08:00Testing Complete! I have just finished my experiment! Thank you to my 17 test subjects! More information should be coming soon...<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TS_FpDBKQYI/AAAAAAAAAQ0/IK3hLRMmZf0/s1600/dqherrera4m.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="320" src="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TS_FpDBKQYI/AAAAAAAAAQ0/IK3hLRMmZf0/s320/dqherrera4m.jpg" width="256" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Paloma Herrera, ABT Principal </td></tr>
</tbody></table>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-9449161309573087532011-01-10T15:24:00.000-08:002011-01-16T08:19:09.885-08:00Breaking In the Shoes<div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSuUDa2NSOI/AAAAAAAAAQw/s5F_6wpJ5tQ/s1600/pspbreakingin.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSuUDa2NSOI/AAAAAAAAAQw/s5F_6wpJ5tQ/s1600/pspbreakingin.jpg" /></a></div><span style="font-family: "Times New Roman","serif"; font-size: 14pt;"> When they are new, the shoes are very hard. There are many methods to “breaking in” pointe shoes, including slamming them in a door and bending the shoe with your hands. Other dancers prefer to break in their shoes by wearing them and bending them with their feet. It is important that the shoes are broken in because broken in shoes form to the dancer’s arch. This helps to support the dancer. However, once they are broken in, the shoes quickly deteriorate. When they are too soft to properly support the dancer, the shoes are referred to as “dead”.</span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSuUDa2NSOI/AAAAAAAAAQw/s5F_6wpJ5tQ/s1600/pspbreakingin.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><br />
</a></div><div class="separator" style="clear: both; text-align: center;"></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-40873040466774672812011-01-09T15:49:00.000-08:002011-02-12T08:17:55.662-08:00Pictures!<div class="separator" style="clear: both; text-align: center;"><a href="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAs2a3KZI/AAAAAAAAAQc/6yhWrk-tHnQ/s1600/DSCN0257.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAs2a3KZI/AAAAAAAAAQc/6yhWrk-tHnQ/s320/DSCN0257.jpg" width="240" /> </a></div><div class="separator" style="clear: both; text-align: center;">Recording the subject's weight. </div><div class="separator" style="clear: both; text-align: center;"><a href="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAtvUJMeI/AAAAAAAAAQg/Xy6qlcv-cmY/s1600/DSCN0258.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAtvUJMeI/AAAAAAAAAQg/Xy6qlcv-cmY/s320/DSCN0258.jpg" width="240" /></a></div><div style="text-align: center;"> Tracing the subject's foot.</div><div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAuR8CpXI/AAAAAAAAAQk/DD8PGfOfsok/s1600/DSCN0259.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAuR8CpXI/AAAAAAAAAQk/DD8PGfOfsok/s320/DSCN0259.jpg" width="240" /></a></div><div style="text-align: center;"> Tracing the subject's foot in demi-pointe.</div><div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAvVBtX1I/AAAAAAAAAQo/Q-ETz_C95cE/s1600/DSCN0260.jpg" imageanchor="1"><img border="0" height="320" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpAvVBtX1I/AAAAAAAAAQo/Q-ETz_C95cE/s320/DSCN0260.jpg" width="240" /></a></div><div style="text-align: center;"> Tracing the subject's foot en pointe</div><div class="separator" style="clear: both; text-align: center;"><a href="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpA4XqP7uI/AAAAAAAAAQs/UyG_FZVtc8I/s1600/196.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TSpA4XqP7uI/AAAAAAAAAQs/UyG_FZVtc8I/s320/196.JPG" width="249" /></a></div><div style="text-align: center;">Calculating the area.</div>Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-7390551127245344792.post-2327852487007304782011-01-09T06:15:00.000-08:002011-01-16T08:18:28.229-08:00Pointe-Related Injuries<div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSnCwx2UrOI/AAAAAAAAAQY/NgGEeWlPkcE/s1600/pointexray2.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="320" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TSnCwx2UrOI/AAAAAAAAAQY/NgGEeWlPkcE/s320/pointexray2.jpg" width="260" /></a></div><span style="font-family: "Times New Roman","serif"; font-size: 14pt;"> Though beautiful, pointe work is very painful. Many injuries result from the force being put on the feet and toes. These injuries can be minor, such as blisters, or major, such as a broken ankle. Other injuries caused by pointe shoes are bunions, ingrown toenails, tendonitis (commonly in the Achilles tendon) , os trigonum syndrome (associated with flexing the foot), osteoarthritis, and stress fractures. Although nonspecific to pointe shoes, knee and hip injuries may result from forcing turnout and repeated bending of the knees (known as plié).<br />
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</span>Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-7390551127245344792.post-60236435239685940542011-01-08T15:28:00.002-08:002011-01-16T08:18:07.432-08:00"Dead" ShoesAs you can tell from the information I am gathering, pointe shoes withstand a lot of force. Eventually, the shoes are too soft to dance in. Dancer's call these shoes "dead". Pointe shoes last anywhere from one performance (such as those of a professional dancer) to a year, depending on the frequency of use and materials.<br />
*Note: I did not take this video*<br />
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unhidewhenused="false" qformat="true" name="Subtle Reference"> <w:lsdexception locked="false" priority="32" semihidden="false" unhidewhenused="false" qformat="true" name="Intense Reference"> <w:lsdexception locked="false" priority="33" semihidden="false" unhidewhenused="false" qformat="true" name="Book Title"> <w:lsdexception locked="false" priority="37" name="Bibliography"> <w:lsdexception locked="false" priority="39" qformat="true" name="TOC Heading"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:105%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--> <div align="center"> <table class="MsoNormalTable" style="width: 145.15pt; margin-left: 5.15pt; border-collapse: collapse;" width="194" border="0" cellpadding="0" cellspacing="0"> <tbody><tr style="height: 18.3pt;"> <td colspan="2" style="width: 145.1pt; border: 1pt solid windowtext; background: none repeat scroll 0% 0% rgb(255, 204, 204); padding: 0in 5.4pt; height: 18.3pt;" valign="bottom" width="193" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: center; line-height: normal;" align="center"><span style=";font-family:";font-size:16pt;color:black;" >Averages</span><span style=";font-family:";color:black;" ></span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >a</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >138.6633</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >d</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >46.3</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >p</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >13.18333</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >2a</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >277.3267</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >2d</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >92.6</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >2p</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >26.36667</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/a</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >3.852742</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/d</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >11.86483</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/p</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >40.81501</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/2a</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >1.392637</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/2d</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >5.932413</span></p> </td> </tr> <tr style="height: 18.3pt;"> <td style="width: 49.45pt; border-width: medium 1pt 1pt; border-style: none solid solid; height: 18.3pt;color:-moz-use-text-color windowtext windowtext;" valign="bottom" width="66" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;"><span style=";font-family:";color:black;" >n/2p</span></p> </td> <td style="width: 95.7pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; height: 18.3pt;color:-moz-use-text-color windowtext windowtext -moz-use-text-color;" valign="bottom" width="128" nowrap="nowrap"> <p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: right; line-height: normal;" align="right"><span style=";font-family:";color:black;" >20.4075</span></p> </td> </tr> </tbody></table> </div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-973017052064953192010-12-21T07:52:00.000-08:002011-01-08T19:55:34.166-08:00Rough Draft Posted Under "Documents"I just posted my rough draft on the capzle. To find it, click on the link under "Documents" on the side bar. The paper includes my current data table, procedure, introduction, and more information.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-15034621952636279972010-12-03T18:48:00.000-08:002011-01-08T19:56:03.760-08:00The Experiment Has Begun!I have began working on the experiment phase of this project. I have found many test subjects through my ballet class. For more information on the procedures of this study, you can read my research plan. You can find it by clicking on the documents link on the right side bar.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-71738845658016893092010-11-08T16:05:00.000-08:002011-01-16T08:17:12.700-08:00Force, Weight, and Mass<span style="font-weight: bold;">What is a force?<br />
</span>A force is any push or pull. The guy in the picture is exerting a force.<a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNiSRy_8HNI/AAAAAAAAAP0/mAiIiZ-XqaI/s1600/pull.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5537336576297409746" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNiSRy_8HNI/AAAAAAAAAP0/mAiIiZ-XqaI/s320/pull.jpg" style="cursor: pointer; float: right; height: 148px; margin: 0pt 0pt 10px 10px; width: 262px;" /></a><br />
<br />
<span style="font-weight: bold;">What is mass?</span><br />
Mass is<span style="font-weight: bold;"> </span>the amount of matter in an object. It is measured in grams using a triple beam balance.<br />
<br />
<span style="font-weight: bold;">What is Weight?<br />
<span style="font-weight: bold;"></span></span>Weight is the pull of gravity on an object. Since weight is a measure of force, it can be measured in Newtons.<br />
<br />
1 Pound = 4.45 Newtons<br />
<br />
<span style="font-weight: bold;">What is a Newton?<br />
</span>Newtons are the metric unit for force. It can be measured using a spring scale.<br />
<br />
<span style="font-weight: bold;">Is there a difference between weight and mass?<br />
<span style="font-weight: bold;"><span style="font-weight: bold;"><span style="font-weight: bold;"></span></span></span></span>Yes. Weight is a measure of force, and mass is a measure of matter. Your mass always stays the same. Your weight can change depending on your location. If you were on the moon, your weight would be different than it is on Earth, but your mass would be the same.<span style="font-weight: bold;"><span style="font-weight: bold;"><span style="font-weight: bold;"><span style="font-weight: bold;"></span></span></span><br />
</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-67655094210738907022010-11-07T08:25:00.001-08:002011-02-12T08:18:39.487-08:00Ballet Terms Quiz<img border="0" height="0" src="http://counters.gigya.com/wildfire/IMP/CXNID=2000002.0NXC/bT*xJmx*PTEyODkxNTE2OTI3MjcmcHQ9MTI4OTE1MTY5NzgwNCZwPTIwNDMyMSZkPSZnPTEmbz1iZTgzNDJjNTg3Nzc*YmE1YTlh/YmYwZDNhYzQ2MTkyZSZvZj*w.gif" style="height: 0px; visibility: hidden; width: 0px;" width="0" /><iframe frameborder="0" height="480" name="mystudiyoIframe" scrolling="no" src="http://www.mystudiyo.com/act126797/mini/go/ballet_terms" title="MyStudiyo.com" width="550">&amp;lt;p&amp;gt;&amp;amp;amp;amp;amp;lt;p&amp;amp;amp;amp;amp;gt;&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;a href="http://www.mystudiyo.com/act126797/mini/go/ballet_terms"&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;ballet_terms&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;/a&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;&amp;amp;amp;amp;amp;lt;/p&amp;amp;amp;amp;amp;gt;&amp;lt;/p&amp;gt;</iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-77610853863160643432010-11-07T07:52:00.000-08:002011-01-16T08:16:51.284-08:00Who was the First to Dance En Pointe?<a href="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TNbNEpcpYAI/AAAAAAAAAPM/xwCF4XIbnWM/s1600/200px-Sylphide_-Marie_Taglioni_-1832_-2.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536838271627780098" src="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TNbNEpcpYAI/AAAAAAAAAPM/xwCF4XIbnWM/s320/200px-Sylphide_-Marie_Taglioni_-1832_-2.jpg" style="cursor: pointer; float: left; height: 280px; margin: 0pt 10px 10px 0pt; width: 200px;" /></a> It is said that Marie Taglioni was the first to dance en pointe. In 1832, she performed <span style="font-style: italic;">La Sylphide</span> entirely en pointe. However, there may have been others who danced en pointe before her. Her shoes were nothing more than tightly-fitting slippers with a leather sole and some darning on the sides. Her fans loved her so much that they cooked her shoes and ate them with a sauce!<br />
<a href="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNbNS_Dx72I/AAAAAAAAAPc/5KoKY5NaYqE/s1600/taglioni+shoes.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536838517947232098" src="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNbNS_Dx72I/AAAAAAAAAPc/5KoKY5NaYqE/s320/taglioni+shoes.gif" style="cursor: pointer; display: block; height: 131px; margin: 0px auto 10px; text-align: center; width: 206px;" /></a><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNbNK88u-nI/AAAAAAAAAPU/MvI1fFZflS0/s1600/taglioni+shoes.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><br />
</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-10351180924877389712010-11-06T19:52:00.000-07:002011-01-16T08:16:29.491-08:00How It's Made- Pointe ShoesVideo from <a href="http://www.youtube.com/watch?v=fzB1yY2397E">http://www.youtube.com/watch?v=fzB1yY2397E</a><br />
<object height="385" width="480"><param name="movie" value="http://www.youtube.com/v/fzB1yY2397E?fs=1&hl=en_US&color1=0xcc2550&color2=0xe87a9f"><param name="allowFullScreen" value="true"><param name="allowscriptaccess" value="always"><embed src="http://www.youtube.com/v/fzB1yY2397E?fs=1&hl=en_US&color1=0xcc2550&color2=0xe87a9f" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-47850099916756452692010-11-06T10:31:00.000-07:002011-01-16T08:15:56.233-08:00Parts of a Pointe ShoePointe shoes are made of many different parts. Some of the main parts are the box, platform, shank, and vamp.<br />
<br />
<span style="font-weight: bold;">Box-<br />
</span><a href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNWRinlAMaI/AAAAAAAAAOE/xVtuRJU_KbY/s1600/box.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" style="font-weight: bold;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536491340847657378" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNWRinlAMaI/AAAAAAAAAOE/xVtuRJU_KbY/s320/box.jpg" style="cursor: pointer; height: 222px; width: 157px;" /></a><br />
The <span style="font-weight: bold;">box</span> is the hard area around the dancer's toes. It supports the sides of the foot. The box is made of canvas, linen, and glue. The stiffness may vary in different shoes.<br />
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<span style="font-weight: bold;">Platform-</span><br />
<a href="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXX7mMO6AI/AAAAAAAAAOU/mb7A0NuBT_g/s1600/platform.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536568735786002434" src="http://4.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXX7mMO6AI/AAAAAAAAAOU/mb7A0NuBT_g/s320/platform.jpg" style="cursor: pointer; height: 222px; width: 157px;" /></a><br />
The <span style="font-weight: bold;">platform</span> is the part of the shoe that the dancer stands on. It provides a flat surface to balance on.<br />
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<span style="font-weight: bold;">Vamp<span style="font-weight: bold;">-</span></span><br />
<a href="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXYhRSAtFI/AAAAAAAAAOc/hU9dcC_iO3c/s1600/vamp.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536569383008121938" src="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXYhRSAtFI/AAAAAAAAAOc/hU9dcC_iO3c/s320/vamp.jpg" style="cursor: pointer; height: 222px; width: 157px;" /></a><br />
The <span style="font-weight: bold;">vamp</span> is the front of the box. The depth of the vamp varies in different types of shoes.<br />
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<span style="font-weight: bold;">Shank-</span><br />
<a href="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXZi6mUm7I/AAAAAAAAAOk/4svy3DGeWKs/s1600/shank.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536570510790663090" src="http://3.bp.blogspot.com/_l8Tz0Dn_C8Y/TNXZi6mUm7I/AAAAAAAAAOk/4svy3DGeWKs/s320/shank.jpg" style="cursor: pointer; height: 222px; width: 157px;" /></a><br />
The <span style="font-weight: bold;">shank</span> is what supports the dancer's arch. It is made of hard leather, plastic, cardboard, or burlap. Shanks come in many different strengths. Different strengths are used depending on the strength of the dancer's foot.<br />
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<span style="font-weight: bold;">Did You Know: </span>Every pointe shoe is handmade. Because of this, every shoe is unique.<br />
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<span style="font-weight: bold;">Inside a Pointe Shoe:<br />
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</span><a href="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNYSSjy28KI/AAAAAAAAAO0/5_hhC-NuKLw/s1600/grishkopeekinside.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5536632901954105506" src="http://1.bp.blogspot.com/_l8Tz0Dn_C8Y/TNYSSjy28KI/AAAAAAAAAO0/5_hhC-NuKLw/s320/grishkopeekinside.gif" style="cursor: pointer; height: 118px; width: 320px;" /></a><br />
<span style="font-style: italic;">Image from</span> <a href="http://www.dancer.com/peekinside.php" style="font-style: italic;">http://www.dancer.com/peekinside.php</a><br />
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</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7390551127245344792.post-9430512124226602342010-11-02T19:42:00.000-07:002011-01-08T20:02:11.230-08:00Introduction<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNDNLv-Jp3I/AAAAAAAAAN0/RlK5F49HguY/s1600/sylviagmurphy.jpg"><img style="float: left; margin: 0pt 10px 10px 0pt; cursor: pointer; width: 229px; height: 320px;" src="http://2.bp.blogspot.com/_l8Tz0Dn_C8Y/TNDNLv-Jp3I/AAAAAAAAAN0/RlK5F49HguY/s320/sylviagmurphy.jpg" alt="" id="BLOGGER_PHOTO_ID_5535149543777740658" border="0" /></a> <span style="color: rgb(0, 0, 0);"> <span style=";font-family:arial;font-size:100%;" >Have you ever wondered how ballerinas stand on the tips of their toes? Pointe shoes, a special kind of ballet shoe, enable a dancer to stand up "en pointe." In this project, I will examine the physics behind a ballerina's pointe shoes.</span></span><span style=";font-family:arial;font-size:100%;" ><br /><br /></span><span style="color: rgb(0, 0, 0);font-family:arial;font-size:100%;" >Problem:</span> <!--[if gte mso 9]><xml> <w:worddocument> <w:view>Normal</w:View> <w:zoom>0</w:Zoom> <w:trackmoves/> <w:trackformatting/> <w:punctuationkerning/> <w:validateagainstschemas/> <w:saveifxmlinvalid>false</w:SaveIfXMLInvalid> <w:ignoremixedcontent>false</w:IgnoreMixedContent> <w:alwaysshowplaceholdertext>false</w:AlwaysShowPlaceholderText> <w:donotpromoteqf/> <w:lidthemeother>EN-US</w:LidThemeOther> <w:lidthemeasian>X-NONE</w:LidThemeAsian> <w:lidthemecomplexscript>X-NONE</w:LidThemeComplexScript> <w:compatibility> <w:breakwrappedtables/> <w:snaptogridincell/> <w:wraptextwithpunct/> <w:useasianbreakrules/> <w:dontgrowautofit/> <w:splitpgbreakandparamark/> <w:dontvertaligncellwithsp/> <w:dontbreakconstrainedforcedtables/> <w:dontvertalignintxbx/> 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mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p class="MsoNormal" style="line-height: normal; color: rgb(0, 0, 0);font-family:arial;"><span style="font-size:100%;">How much force (in Newtons) per square centimeter is on a dancer’s toes in pointe shoes? How does this change when a dancer is standing flat, standing on the ball of their foot, and standing en pointe? How does this change when a dancer is standing on one foot?</span></p><span style="color: rgb(0, 0, 0);font-family:arial;font-size:100%;" > Hypothesis:</span> <!--[if gte mso 9]><xml> <w:worddocument> <w:view>Normal</w:View> <w:zoom>0</w:Zoom> <w:trackmoves/> <w:trackformatting/> <w:punctuationkerning/> <w:validateagainstschemas/> <w:saveifxmlinvalid>false</w:SaveIfXMLInvalid> <w:ignoremixedcontent>false</w:IgnoreMixedContent> <w:alwaysshowplaceholdertext>false</w:AlwaysShowPlaceholderText> <w:donotpromoteqf/> <w:lidthemeother>EN-US</w:LidThemeOther> <w:lidthemeasian>X-NONE</w:LidThemeAsian> <w:lidthemecomplexscript>X-NONE</w:LidThemeComplexScript> <w:compatibility> <w:breakwrappedtables/> <w:snaptogridincell/> <w:wraptextwithpunct/> <w:useasianbreakrules/> <w:dontgrowautofit/> <w:splitpgbreakandparamark/> <w:dontvertaligncellwithsp/> <w:dontbreakconstrainedforcedtables/> <w:dontvertalignintxbx/> <w:word11kerningpairs/> <w:cachedcolbalance/> <w:usefelayout/> </w:Compatibility> 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mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p class="MsoNormal" style="line-height: normal; color: rgb(0, 0, 0);font-family:arial;"><span style="font-size:100%;">There will be the most force (in Newtons) on a dancer’s foot when they are standing on one foot en pointe. The force will be the least per square centimeter when a dancer is standing flat on two feet.</span></p> <span style=";font-family:arial;font-size:100%;" ><br /></span><div style="text-align: center;font-family:arial;"><span style="font-size:100%;"><br /></span></div>Unknownnoreply@blogger.com0