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Winter Olympics Physics
Transcript of Winter Olympics Physics
The hockey stick hits the ice as the player swings it, bending it back and storing potential energy. The player then rotates his wrist and shifts his weight onto other leg, transferring all the energy into the snap back at the puck, changing into the puck's kinetic energy, and achieving a high velocity.
The bobsledders can only apply force when they are pushing the sled so it is important to conserve this force down the track and not bump into anything.
Acceleration is created at the start when the bobsledders push the bobsled and whenever they turn. Gravity accelerates the bobsled down the track at 9.8 /m/s/s.
Drag, air resistance, slows the bobsled down so the suits and sled are designed to reduce drag. Sliding friction can also slow it down, especially when the sled bumps into the sides.
The skater pushes off the ice which pushes her up. When her vertical velocity reaches zero at the maximum height of the jump, gravity will accelerate the skater back down to the ice.
The skater pushes off the ice with her foot which applies a reaction on the skater, generating angular momentum. The more angular momentum, the faster the skater spins.
It also determines the rotation speed in a jump.
Law of Conservation of Angular Momentum:
The skater spreads out her arms to rotate slowly but as she pulls in her arms she goes faster because her body mass is closer to the rotational axis.
Law of Projectile Motion:
When launching into a jump, the skater becomes a projectile, moving both vertically and horizontally. Gravity pulls on the skater, decreasing her vertical velocity but not changing her horizontal velocity, creating an arch called a parabola. This explains how when a skater throws his partner in the air, he can catch her because their horizontal velocity is the same.
By: Lori Huang