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Moment of inertia of a body about a give...

Moment of inertia of a body about a given axis is `1.5 kg m^(2)`. Initially the body is at rest. In order to produce a rotational kinetic energy of 1200 J, the angular acceleration of `20 rad//s^(2)` must be applied about the axis for a duration of _________ (in sec).

Text Solution

Verified by Experts

`omega=alpha t=20 t`
Given `1/2 I omega^(2)=1200`
or `1/2 xx1.5xx(205)^(2)=1200`
or t=2s
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