A 10 kg mass initially sitting on the ground is placed on a ledge 3 meters above ground level. What is the increase in potential energy of the mass?

A 10 kg mass initially sitting on the ground is placed on a ledge 3 meters above ground level. What is the increase in potential energy of the mass?
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ANSWER: 294 JOULES (accept 300 JOULES, ASSUMES g=10m/sec2)
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