Answers: 1
, the particle should have a velocity of 
.At 
, the particle should have a velocity of 
.At 
, the particle should have a velocity of 
.
, at 
, the particle should have a velocity of 
.
is equal to zero. For 
:![\begin{aligned}v &= \frac{\rm d}{{\rm d}t}\, [s] = \frac{\rm d}{{\rm d}t}\, \left[\frac{4}{t^2}\right] \\ &= \frac{\rm d}{{\rm d}t}\, \left[4\, t^{-2}\right] = 4\, \left((-2)\, t^{-3}\right) = -8\, t^{-3} =-\frac{8}{t^3}\end{aligned}](/tpl/images/0700/4982/b60b4.png)
.
, 
, and 
to obtain the required results. 
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