1. Brandon Ng 3o3(03)

2.  Also known as Artistic Skating  Olympic sport  Perform spins,jumps and intricate footwork on ice Watch an example of figure skating herehere 2010 Winter Olympics Champion : Kim Yuna

3.  Singles  Pair skating  Ice dancing  Synchronized skating  Adagio skating  A form of pair skating  Acrobatic skating  Combination of circus arts, artistic gymnastics skills  Special figures  Elaborate original designs on ice

4.  Made of many layers of leather  Very stiff to provide ankle support  Toe picks on the front of blade  Used for certain jumps  Blades are sharp to reduce friction, increasing speed  Newton’s law of inertia

5.  Ice is not slippery  When skating, one is skating on water in its liquid form  Ice melts when pressure is applied to it  The greater the pressure on a substance, the lower its freezing point

6.  A person’s weight is unable to melt ice under them  However, the sharp skate blade of the ice skates puts the weight of the skater on a small area  Allows skater to glide on a layer of water between the blade and the ice

7.  Travelling at speeds around 20mph  Completing four revolutions in the air  Land on one leg  Unable to defy gravity or laws of physics  Most people can barely jump high enough to make one revolution without touching the ground

8.  Torque  Force that leads to rotation  Linear motion  Motion along a straight line  Angular momentum  A conserved vector quantity that can be used to describe the overall state of a physical system  Vorticity  A concept describing horizontal rotation In the atmosphere

9.  Skate moves without falling down  Angular momentum helps stabilize the moving body, just like someone riding a bicycle  Skaters spread their arms then bring their hands closer to their bodies  Causing a large moment of inertia  Speed of spinning increases

10.  Spinning is also dependent on torque  Force must be applied some distance from the axis of rotation  ie. If I push a stationary person’s arms, he can spin, but if I push the middle of his body, he will barely move  Force is achieved by pushing the ice  Newton’s law of action-reaction forces  Multiple spins are accomplished with the result from the torque created by turning of one’s skates as one pushes off the ice

11.  The larger or further the force is from the axis of rotation, the larger the torque  The larger the torque, the greater the angular momentum, the more spins made Some skaters can reach rotation speeds of 7 revolutions during a jump, 420 revolutions per minute!

12.  Rotational speed increased by pulling in their hands closer to body  Reduces air resistance  Streches out their hands and legs for stability while landing Skaters can produce extreme angular momentum at take-off, that they might not be physically strong enough to counteract the G-forces experienced during the rotation. The G-force felt by the arms during a jump or spin may exceed 4Gs!

13.  http://goldsea.com/810/27sp-kim.html http://goldsea.com/810/27sp-kim.html  http://en.wikipedia.org/wiki/Figure_skating#Disciplines http://en.wikipedia.org/wiki/Figure_skating#Disciplines  http://www.livescience.com/culture/phsyics-of-figure-skating-100216.html http://www.livescience.com/culture/phsyics-of-figure-skating-100216.html  http://weblogs.cltv.com/features/health/livinghealthy/2010/01/skate-your-way-to-health-rockf.html http://weblogs.cltv.com/features/health/livinghealthy/2010/01/skate-your-way-to-health-rockf.html  http://www.stuffintheair.com/the-physics-of-ice-skating.html http://www.stuffintheair.com/the-physics-of-ice-skating.html  http://en.wikipedia.org/wiki/Angular_momentum#Definition http://en.wikipedia.org/wiki/Angular_momentum#Definition  http://btc.montana.edu/olympics/physbio/biomechanics/cam02.html http://btc.montana.edu/olympics/physbio/biomechanics/cam02.html  http://btc.montana.edu/olympics/physbio/biomechanics/cam03.html http://btc.montana.edu/olympics/physbio/biomechanics/cam03.html  http://www.helium.com/items/197024-the-science-behind-ice-skating http://www.helium.com/items/197024-the-science-behind-ice-skating  http://www.fouldsy.com/2007/04/