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## Homework Statement

A rock with a weight of 120 N free falls from height of 2.00m collides with with Earth and digs 60 mm into it. What is the Earth's average force of resistance

## Homework Equations

F=m*g => m=F/g

m*g*h = 1/2*m*v^2

v=√(2*g*h)

## The Attempt at a Solution

I found the velocity of a rock just before collision using the law of conservation of energy. I now know the velocity which I got 6.3 m/s but now I am stumped on how do i find the forces exerted by Earth to stop the rock from digging deeper.

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