A 5.0-kg ball rolls without sliding from rest down an inclined plane.A 4.0-kg block, mounted on roller bearings totaling 100 g, rolls from rest down the same plane.At the bottom, the block has:
A)greater speed than the ball
B)less speed than the ball
C)the same speed as the ball
D)greater or less speed than the ball, depending on the angle of inclination
E)greater or less speed than the ball, depending on the radius of the ball

Question

Quizplus · Accepted Answer

The block has greater speed than the ball because it does not have rotational kinetic energy, while the ball does. The ball's energy is divided between translational and rotational kinetic energy, resulting in a lower translational speed compared to the block.

A 50-Kg Ball Rolls Without Sliding from Rest Down an Inclined