Energy Talk!

Question about conservation of energy: How is energy conserved if a rock is dropped from the top of a building

kmm4864990 asked: That is, initially the rock has a high potential energy. Then, its energy is converted into kinetic energy as it falls. So i understand energy is merely changing form.
But then it hits the ground. The rock ceases moving at a relative height of zero. Into what form was the enrgy [...]