Question

A body rolling down a hill has :

• A. K.E. only
• B. P.E. only
• C. neither K.E. nor P.E.
• D. both K.E. and P.E

Answer 1

Answer: (D)

both K.E. and P.E

A ball rolling down a hill has both Kinetic and potential energy. Kinetic energy is due to motion. So if the ball is rolling down it has kinetic energy. Potential energy is the stored energy which is waiting to be used. If the ball is at a greater height it will have more potential energy. So when the body starts rolling the stored potential energy gets converted into kinetic energy which causes its motion. Hence a body rolling down a hill has both K.E and P.E