A solid iron sphere `A` rolls down an inclined plane. While an identical hollow sphere `B` of same mass sides down the plane in a frictionless manner. At the bottom of the inclined plane, the total kinetic energy of sphere `A` is.

Options

A. less than that of `B`
B. equal to that of `B`
C. more than that of `B`
D. sometimes more and sometimes less.

Answer

B

Explanation

(b) In both the cases, the loss of gravitational potential energy and the resulting gain of 'total kinetic energy' is same.