A wheel is rolling on the floor, friction will always act in the direction opposite to the direction in which the wheel is moving.
Which of these statements describe the correct properties of friction?
A. Rolling friction is always greater than sliding friction.
B. Friction acts in the opposite direction of relative motion.
C. Friction causes the surfaces in contact to wear away.
D. Friction produces heat energy.
A ball is rolling towards north direction , then which direction will the frictional force act ?
Read each statement below carefully, and state, with reasons, if it is true or false;
(a) During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.
(b) The instantaneous speed of the point of contact during rolling is zero.
(c) The instantaneous acceleration of the point of contact during rolling is zero.
(d) For perfect rolling motion, work done against friction is zero.
(e) A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling) motion.