The displacement X (in meters) of a body varies with time (in sec) as x=- (4)/(5)t^(2) + 16+ + 20. The velocity of body will be zero at time:

The displacement X (in meters) of a body varies with time (in sec) as

1.	The displacement X (in meters) of a body varies with time (in sec) as x=- (4)/(5)t^(2) + 16+ + 20. The velocity of body will be zero at time:
Answer» 8 s 10 s 16 s 20 s Solution :Here `X=-(4)/(5)t^(2) +16t+20` Then `V=(dx)/(DT)=-(8)/(5)xxt+16` or` 0 =-(8)/(5)t +16` or `(8)/(5)t=16` or t=10 s

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The displacement X (in meters) of a body varies with time (in sec) as x=- (4)/(5)t^(2) + 16+ + 20. The velocity of body will be zero at time:

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