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The angular displacement at any time t i...

The angular displacement at any time t is given by `theta(t) = 2t^(3)-6^(2)`. The torque on the wheel will be zero at

A

`t=2` s

B

`t=1` s

C

`t=0.2` s

D

`t=0.25` s

Text Solution

Verified by Experts

The correct Answer is:
B
`theta(t)=2t^(3)-6t^(2)`
implies `omega=(d theta)/(dt)=6t^(2)-12timpliesalpha=(d omega)/(dt)=12t-12`
`alpha=0impliest=1"sec"` .
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