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OpenStudy (anonymous):
In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ground? 1.2 joules 4.9 joules 2.0 joules 6.8 joules
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