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The displace ment of a body at any time t after starting is given by `s=10t-(1)/(2)(0.2)t^2`. The velocity of the body is zero after:A. 50 sB. 100 sC. 80 sD. 40 s |
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Answer» Correct Answer - A `v=(ds)/(dt)=10-0.2t` For `v=0` `t=(10)/(0.2)=50`sec |
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