Which of the following options is correct for the given diagram? Let the friction coefficient be sufficient for pure rolling.
Answer & explanation
Correct answer: option 4
For the motion to be pure rolling the velocity of contact point must be zero & V = Rw. From the frame of the centre of the sphere, the contact point has a speed of Rw in the forwards direction, so from the ground frame the velocity of contact point is V + Rw in the forwards direction. The sphere is slipping and thus, friction will act in the backward direction against the velocity of contact point.