1. The problem statement, all variables and given/known data 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 2. Relevant equations F=m*g => m=F/g m*g*h = 1/2*m*v^2 v=√(2*g*h) 3. 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 im stumped on how do i find the forces exerted by earth to stop the rock from digging deeper.