Energy of Rock at Top and Bottom of Hill
How is the energy of a rock sitting on the top of a
hill different the energy of rock sitting at the bottom of the same hill?
There is no difference in the energy of the rock at the top of the
hill and the energy of the rock at the bottom of the hill. There is
a difference in the energy stored in the gravitational field, but not the rock.
---Nathan A. Unterman
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Update: June 2012