# physics

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Object A has a gravitational potential energy of 24 joules when it rests on a shelf 5 m above the ground. Object B has a mass that is three times the mass of Object A. What would be the gravitational potential energy of object B when it rests on a shelf 10 m above the ground?

o A. 72 joules

o B. 120 joules

o C. 144 joules

o D. 240 joules

• physics -

ISn't GPE proportional to mass x height?

• physical science -

24 = w x 5
w = 24/5
w = 4.8

4.8 x 3
= 14.4

gpe = 14.4kg x 10m
= 144

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