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_wolfgang_
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Homework Statement
a rubber ball mass of 0.08 kg bounces vertically on a concrete floor. the ball strikes the floor at 10 ms-1 and rebounds at 8 ms-1. The time in contact with the floor is 0.05 sec.
Calculate the average net force acting on the ball during the contact with the floor.
Homework Equations
E=F/t
F=0.5mv^2
The Attempt at a Solution
(0.5x0.08x10^2)/0.05
= 80N
I get a force of 80 N but to me it seems to much to be true... Help?