The formula used to find potential energy is <em>P.E. = M * G * H</em> (P.E. is potential energy, M is mass, G is gravitational pull, and H is height). So the answer to your question is <em>5 * 9.8 * 2</em>, which equals 98.
first off lemme just say this is really easy man, just look at the directions
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Gear because each spike is a wedge shape that adds a mechanical advatage
