An air hockey puck slides on a surface of a frictionless table. If the mass of the puck is 250 grams, and it moves in a straight line with a constant velocity of 4 m/s, find the net force acting on the puck.
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Correct Answer: A. 0 N
Since the velocity is constant, the acceleration a is zero, so using F = ma, we know that the net force must be zero as well.
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