Question

A ball is rolled upward along an inclined plane. After reaching a certain height from the ground, it rolls down along the plane. During the motion of the ball along the inclined plane, the force of friction

A) Always opposes the motion

B) Always facilitates the motion

C) First opposes and then facilitates the motion

D) First facilitates and then opposes the motion
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Answer 1

Answer:

a is the correct answer