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A wheel rotating at an angular speed of ...

A wheel rotating at an angular speed of `20" rads"^(-1)`, is brought to rest by a constant torque in 4s. If the M.I. is `0.2" kg m"^(2)` , the work done in first 2s is

A

50 J

B

30 J

C

20 J

D

10 J

Text Solution

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The correct Answer is:
B
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