What is the reaction of the ground on a ball rebounding from a 5m drop?

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A 2kg ball drops from a height of 5m and rebounds to the same height, with an impact duration of 0.2 seconds. The calculations show that the velocity just before impact is 10 m/s. The force exerted by the ground on the ball during the impact is calculated to be 100 N. The change in velocity of the ball during the impact is confirmed to be 20 m/s. This analysis highlights the dynamics of the ball's rebound and the forces involved in the impact.
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Homework Statement


A ball of 2kg drops from rest to ground from a height 5m and rebounds to the same height.
If the time of duration of the impact between the ball and the ground is 0.2s
what is the total reaction of the ground on the ball

Homework Equations


The Attempt at a Solution


mgh=0.5mv^2
2(10)(5)=1.5(2)v^2
v=10
F=ma
F=2(10/0.2)
F=100
 
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What is the change of velocity of the ball during the impact?

ehild
 
20ms^-1??
 
Yes, this is the magnitude of the velocity change during 0.2 s.

ehild
 

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