What branch of physics best explains the photoelectric effect?
a.) nature of light
b.) general relativity
c.) law of conservation of momentum
d.) thermodynamics

Energy stored in a moving object is called kinetic energy

If the object is moving at a constant elevation, kinetic energy may be the only energy possessed by an object. However, for an object moving down from a uphill location to a downhill location (that is, along a slope), the object possesses both the potential energy and the kinetic energy.