a ball of mass m is dropped froma a height of 5m .it falls on ground and bouces back with same speed .if the ball is in contact with ground for 10 sec,then force exerted by ground is .
a]m
b]2m
c]5m
d]10m
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Ball dropped from a height of= 5m
second ball is contact with ground= 10sec
And= 10/5=2m
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