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Questions  

A body is rolling without slipping on a horizontal plane. The rotational energy of the body is 40% of the total kinetic energy. Identify the body.

a
Ring
b
Hollow cylinder
c
Solid cylinder
d
Hollow sphere

detailed solution

Correct option is D

12Iω212Mv2=4060=23 or Iv2R2Mv2=23 or I=23MR2Clearly, the body is a hollow sphere.

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Similar Questions

In both the figures all other factors are same, except that in Figure (i) AB is rough and BC is smooth while in Figure (ii) AB is smooth and BC is rough. In Figure (i), if a sphere is released from rest it starts rolling. Now consider the Figure (ii), if same sphere is released from top of the inclined plane, what will be the kinetic energy of the sphere on reaching the bottom:


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