Question

a puck slides freely across the horizontal surface of a frozen pond with negligible friction. which of the following is true of the motion of the puck?
a the puck will slide with a constant nonzero acceleration.
b the puck will slide with a decreasing acceleration.
c the puck will slide with an increasing acceleration.
d the puck will slide with a constant velocity.

Explanation:

According to Newton's first law of motion (the law of inertia), an object at rest will remain at rest and an object in motion will remain in motion with a constant velocity unless acted upon by an external force. In this case, the puck is on a surface with negligible friction (so the net external force acting on it in the horizontal direction is essentially zero).

Answer:

D. The puck will slide with a constant velocity.