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Moment of Inertia of a Disc

There are two...

Question

There are two similar discs. One is at rest and the other one is rotating with constant speed about an axis passing through its centre and perpendicular to the plane containing the disc. Which one has larger kinetic energy?

A

The one at rest.

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B

The one which is rotating

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C

Both have same non-zero kinetic energy

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D

Both have zero kinetic energy

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Solution

The correct option is B The one which is rotating
Explaination is in the next videoclip.

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