A football player kick a ball with 850 g in 30 m/s directly to wall, if the ball collide the wall in the same speed, then regressed after 300 ns, in 18 m/s, find the average force that affect the ball?
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Answer:
Explanation:
force= dp/dt
=m1v1-m2v2
=0.85(30-18) / 300*10^-9
=0.85*12/ 3*10^-7
=3.4*10^7
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