The gravitational potential energy of the rock is 14,700 J
Explanation:
The gravitational potential energy (GPE) of an object is the energy possessed by the object due to its position in a gravitational field.
For an object near the Earth's surface, its GPE is
[tex]GPE=mgh[/tex]
where
m is the mass of the object
[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity near the surface
h is the height of the object above the ground
For the rock in this problem,
m = 100 kg
h = 15 m
Therefore,
[tex]GPE=(100)(9.8)(15)=14,700 J[/tex]
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