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# Physics in Figure Skating

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## Najla Al-Khulaifi

on 3 December 2012

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#### Transcript of Physics in Figure Skating

Figure Skating Physics in Figure Skating Figure skating is a sport in which individuals, duos, or groups perform spins, jumps, moves in the field, and other elements and moves on figure skates.
It was considered as a Winter Olympic Sport since 1924. Newton's First Law of Motion An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.This law is often called "the law of inertia". Newton's Second Law of Motion Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Newton's First law & Figure Skating This is put into play when a player is skating. The skater would keep going until an outside source acts upon it then it may stop. For example if a skater skater into the boarder then they will stop. Newton's Second Law & Figure Skating When you push off on skates on clean ice, you'll glide for quite a while - the blades slide over the ice with very little friction. Eventually, the frictional forces will slow you to a halt. Newton's Third Law of Motion For every action there is an equal and opposite reaction. Newton's Third Law & Figure Skating When they push off against the ice, or "stroke" with their skates, they are applying a force down and back against the ground.
The ground just pushes right back, supplying a force forward and up that propels the skaters into a glide or jump, depending on the particulars of the force they applied. Momentum & the Conservation of Momentum Momentum is how much force it would take to stop a moving object.
Angular momentum characterizes an object's resistance to change in rotation.
The law of conservation of momentum tells us that you can't just lose momentum - it has to go somewhere. Momentum & Figure Skating Conservation of angular momentum: as the skater reduces her rotational inertia by pulling her arms and leg in, her rotation speed must increase to maintain constant angular momentum. Friction The resistance that one surface or object encounters when moving over another. Friction & Figure Skating In ice skating, friction is used to start a stroke.
Friction is invaluable in stopping on ice skates. Resources http://www.janerigby.net/JRR/skating/friction.html#construct
http://teachertech.rice.edu/Participants/louviere/Newton/law1.html
https://thescienceclassroom.wikispaces.com/Momentum
http://www.bsharp.org/physics/spins
http://www.sciencekids.co.nzo/friction.html

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