An 80kg parachutist jumps out of an airplane. Neglecting air friction, how fast will he be going after a 10 second free fall?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Which scientist was the first to propose the heliocentric model of the universe? a. aristotle b. isaac newton c. galileo galilei d. nicolaus copernicus

Robin is swinging back and forth from a trapeze. in which of the following situations is his kinetic energy being transformed into potential energy