Answers

2016-01-03T20:23:52+05:30
We know that F =ma
as the man has pushed the ball so initial velocity = 0 m/s
and final velocity = 5m/s
a = v - u/t
t =1/80 s
m = 40 ks
so, force = 40(5 - 0/1/80)
= 40(5 * 80) = 40 * 400 = 16000 N
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