Science Problems? to find Potential energy and kinetic energy?

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Science Problems? to find Potential energy and kinetic energy?

An object held in the air has a GPE of 470J. The object is then dropped. Halfway down, what is the objects kinectic energy?

A system has a total mechanical energy of 350J and a kinetic energy of 220J. what is the potential energy?

2007-09-12 13:05:46 · 1 answers · asked by (>_<) 3 in Science & Mathematics ➔ Physics

1 answers

These "problems" are just simple addition & subtraction.
Total energy = KE + PE

PE0 = 470 J, KE0 = 0
Halfway down, PE = PE0/2, so KE also = PE0/2 = 235 J

KE + PE = 350 J, KE = 220 J, so PE = 130 J

2007-09-12 14:18:24 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋