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A circular disc has a mass of 1kg and ra...

A circular disc has a mass of 1kg and radius 40 cm. It is rotating about an axis passing through its centre and perpendicular to its plane with a speed of 10rev/s. The work done in joules in stopping it would be-

A

4

B

47.5

C

79

D

158

Text Solution

Verified by Experts

The correct Answer is:
D
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