General questions: Suppose you are playing hockey on a new-age ice surface for which there is no friction between the ice and the hockey puck. You wind up and hit the puck as hard as you can. After the puck loses contact with your stick, the puck will
A) start to slow down.
B) not slow down or speed up.
C) speed up a little, and then slow down.
D) speed up a little, and then move at a constant speed.

Question

Quizplus · Accepted Answer

With no friction, there are no external forces acting on the puck after it leaves your stick. Thus, it will continue to move at a constant speed in the direction it was hit. It will not slow down or speed up.

General Questions: Suppose You Are Playing Hockey on a New-Age