Expalin by how much does the potential energy of a 18.0-kg, Ask an Expert

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When an 89.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 1.80 x 103 J. Expalin by how much does the potential energy of a 18.0-kg child increase when the child climbs a normal staircase to the second floor?

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