A) converts translational energy to rotational energy
B) dissipates energy as heat
C) decreases the rotational motion
D) decreases the rotational and translational motion
Correct Answer: A
Solution :
When a body rolls down without slipping along an inclined plane of inclination 9, it rotates about a horizontal axis through its centre of mass and also its centre of mass moves. Therefore, rolling motion may be regarded as a rotational motion about an axis through its centre of mass plus a translational motion of the centre of mass. As it rolls down, it suffers loss in gravitational potential energy provided translational energy due to frictional force is converted into rotational energy.
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