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Questions  

A solid iron sphere A rolls down an inclined plane, without slipping while an identical sphere B slides down the plane in a frictionless manner. At the bottom of the inclined plane, The total kinetic energy of sphere A is

a
less than that of B
b
equal to that of B
c
more than that of B
d
less than B if angle of inclination of the plane is less than 45o

detailed solution

Correct option is B

Total kinetic energy at the bottom must be equal to the total potential energy at the top.

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