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At t=0, a body starts from origin with s...

At `t=0`, a body starts from origin with some initial velocity. The displacement `x(m)` of the body varies with time `t(s)` as `x=-(2//3)t^2+16t+2`. Find the initial velocity of the body and also find how long does the body take to come to rest? What is the acceleration of the body when it comes to rest?

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