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A particle’s velocity v at time t is giv...

A particle’s velocity v at time t is given by `v=2e^(2t) cos""(pi t)/(3)`. The least value of t at which the acceleration becomes zero, is :

A

`pi/90` sec

B

`pi/120` sec

C

`pi/60` sec

D

`pi/30` sec `

Text Solution

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The correct Answer is:
D
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