The potential energy changed because potential energy and kinetic energy are related by Ki+Ui=Kf+Uf.
(The potential energy; changed; because potential energy and kinetic energy are related by Ki+Ui=Kf+Uf) (potential energy and kinetic energy; are related; by Ki+Ui=Kf+Uf)
The potential energy potential energy and kinetic energy
changed are related
because potential energy and kinetic energy are related by Ki+Ui=Kf+Uf
by Ki+Ui=Kf+Uf