Question

Q)A solid sphere is in pure rolling motion on an inclined surface having inclination theetta
1) friction force is zero
2) friction force is dissipative
plane
3) While rolling down friction aids rotation and opposes translation.
4) while rolling down the plane friction is up the plane and while roling up the plane friction is down the plane
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Answer 1

Answer:

1 Answer: the origin of friction. ... The angle of friction, also sometimes called the angle of repose, is the maximum angle at which a load can rest motionless on an inclined plane due to friction, without sliding down. This angle is equal to the arctangent of the coefficient of static friction μs between the surfaces.