Potential at height h — initial potential energy:
Initial kinetic energy:
Potential at the surface of the planet — final potential energy:
Final kinetic energy:
An object of mass m is dropped from height h above a planet of mass M and radius R.
Find an expression for the object's speed as it hits the ground.
Express your answer in terms of the variables m, M,h, R and appropriate constants.
v = _____
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