A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle θ. The frictional force(a) dissipates energy as heat.(b) decreases the rotational motion.(c) decreases the rotational and translational motion.(d) converts translational energy to rotational energy
Answers
When a body rolls down without slipping along an inclined plane of inclination theta,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 factional force is convened into rotational energy.
In fact, friction is needed to cause the body to roll. However the rolling friction is so small that we can use conservation of mechanical energy.
Answer:
D) converts translational energy to rotational energy
Explanation:
Kinetic Energy is represented by three forms: vibrational, rotational, and translational. Vibrational form is the energy caused by an object or molecule moving in a vibrating motion, rotational form is the energy caused by rotating motion, whereas the translational is the energy caused by the movement of one molecule to an another location,
Radius of drum = r
Mass of drum = m
Angle of inclined plane = θ
Thus, when the drum rolls down, the frictional force will convert the translational energy to rotational energy