Slanted surfaces with friction: A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are μ_s = 0.40 and μ_k = 0.30, respectively. The puck's initial speed is 63 m/s. What vertical height does the puck reach above its starting point? A) 130 m B) 270 m C) 200 m D) 66 m

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Quizplus · Accepted Answer

The correct answer is A because the puck will reach a vertical height of 130 m above its starting point. This is because the coefficient of static friction is greater than the coefficient of kinetic friction, so the puck will experience a greater force of friction when it is not moving than when it is moving. This will cause the puck to slow down and eventually stop moving up the ramp. The puck will then slide back down the ramp, but it will not reach its starting point because of the force of friction.

Slanted Surfaces with Friction: a 200 G Hockey Puck Is