If the rock rolls down the hill, the potential energy it had is changed to kinetic energy the energy that is released while it goes down.
(the rock; rolls; down the hill) (the potential energy; had; it) (the potential energy it had; is changed; to kinetic energy) (the energy; is released; T:while it goes down) (it; goes; down)
the rock the potential energy the potential energy it had the energy it
rolls had is changed is released goes
down the hill
it
to kinetic energy
T:while it goes down
down