But as soon as it falls from the cliff, the potential energy of the boulder is changed to energy of motion, or kinetic energy.
(it; falls; from the cliff) (the potential energy of the boulder; is changed; to energy of motion, or kinetic energy; T:as soon as it falls from the cliff)
it the potential energy of the boulder
falls is changed
from the cliff
to energy of motion, or kinetic energy T:as soon as it falls from the cliff