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) speed up a little, and then move at a constant speed.
C) not slow down or speed up.
D) speed up a little, and then slow down.
Question 2
Joe and Bill are playing tug-o-war. Joe is pulling with a force of 200 N. Bill is simply hanging on, but skidding towards Joe at a constant velocity. What is the force of friction between Bill's feet and the ground?
A) 200 N
B) 400 N
C) Less than 200 N
D) Greater than 200 N, but less than 400 N
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