If you want it in Joules, use SI units for mass, g and height H.
E= M g H is the kinetic energy just before it hits the ground
M = 3.36 kg
g = 9.8 m/s^2
H = 23.17 meters
A 7.40 lb rock sits on top of a 76.0 foot cliff. it is pushed off. What is the energy in Joules of the rock just before it hits the ground?
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