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The M.I. of a body is 1.2kgm^(2). Initia...

The M.I. of a body is `1.2kgm^(2)`. Initially the body is at rest. In order to produce a rotational kinetic energy of `1500J` an angular acceleration of `25rads^(-2)` must be applied about the axis for a duration of

A

`2s`

B

`4s`

C

`8s`

D

`10s`

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A
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