Question

2. Friction force working on a rolling body
3. Friction force working on a stationary body

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Answer 1

Explanation:

1.The effect of external force or torque on rolling motion, however, is moderated by friction force between rolling body and surface. ... In doing so, friction causes linear and angular accelerations or decelerations, depending on the requirement of rolling motion.

2.No. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. As a stationary object placed in horizontal direction has no relative motion with anything, there is no frictional force to oppose that motion.

Answer 2

Explanation:

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