An object, m = 2 kg, is dropped from the top of a building whose height...
An object, m = 2 kg, is dropped from the top of a building whose height is h=20 m above the ground.
Assume that g=9.8m/s2
What is its gravitational potential energy with respect to the ground?
Homework Answers
The gravitational potential energy of the object when it is at
the top of the building is
PE = m g h
Where m is the mass of the object, g is the acceleration due to
gravity and h is the height of the building.
PE = 2 kg x 9.8 m/s2 x 20 m
PE = 392 J
When the object reaches the ground, the gravitational potential
energy becomes zero.
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