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bradosaurus
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Homework Statement
A rock is dropped from x(meters) height. The rock weighs 68 kg, and its force at impact with the ground is 15 kiloNewtons. If the acceleration due to gravity is 9.8m/s^2, what is the distance/height the rock has fallen?
Homework Equations
F=m*a
15kN=15000kg*m/s^2
666.4N=68kg*9.8m/s^2
The force exerted by the rock at stationary position is 666.4 Newtons.
The rock fall distance is x meters.
The Attempt at a Solution
666.4N*x=15000N
(666.4kg*m/s^2)*x=15000kg*m/s^2
x=(15000kg*m/s^2)/(666.4kg*m/s^2)
x=22.51
This was all I could come with, but it is simply the ratio of the force. How do I find distance?
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