Question

A group of hockey players are practicing and decide to goof off and hit a puck up a frictionless slope at 50degrees. The puck has an initial velocity of 18 m/s (these aren’t Olympic players).

a. How far up the slope will the puck go?

b. After the puck slides up the slope, it slides back down and then slides on some slushy snow for 3.5 seconds before it stops. What is the magnitude of the acceleration of the puck while it is slowing down on the slushy part?

Answer 1

By law of Conservation of Energy

This is the vertical height,
Distance covered along the slope,

b.
As the pluck starts to slow down after coming back to the ground at the same speed at which it started as energy was not lost on frictionless slope.