A 70.0 kg person jumping down from a 3.00 meter wall hits the ground at 7.70 m/s. He hits the ground with stiff legs and stops in 0.023 seconds. What is the force of impact, in newtons?

Explanation:

Let consider that the person hit the ground in the negative direction. The physical model for the impact is modelled after the Impact Theorem:

The impact is:

The force of impact is derived as follows:

if they have a finite resultant

the closer the planet is to the sun, the larger the gravity