A solid iron sphere A rolls down an inclined plane, while an identical hollow sphere B of same mass slides down the plane in a frictionless manner. At the bottom of the inclined plane, the total kinetic energy of sphere A is
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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 is B.
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Detailed Solution
In both the cases, the loss of gravitational potential energy and the resulting gain of ‘total kinetic energy’ is same.