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38. The position of a body moving along the S-axis is given by S = G) t3 — 5t2 + 25t + 8, with s in meters and tin seconds. Find the body's acceleration a) after one second and h) each time the
velocity is zero. If there are no answers, choose NONE.

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Given s = 723- 5t + 25+ + 8.
Hence velocity &quot;( t ) = rate of change of displacement
v ( t ) = as
&quot; ( + ) = = [ 3+3 - 5t 2 + 25+ + 8 ]
&quot; (+ ) = it&quot;-10t+ 25
And acceleration alt),...

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