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Suppose velocity of a cricket ball hit b...

Suppose velocity of a cricket ball hit by a batsman is given by
`vec(v) = (2hati +6hatj + (@0-10t)hatk)m//s`
` Find the time (t) the acceleration of the ball is perpendicular to its velocity.

A

1s

B

2s

C

3s

D

4s

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