Posted by Anonymous on Monday, January 9, 2012 at 12:56pm.
since v = at
and s = 1/2 at^2
v = sqrt(2as)
the velocity increases till s = 4.6, then decreases till s = -1.6
-2*9.8*4.6 + 2*a*1.6 = 0
a = 28.175m/s^2
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