A 4-kilogram rock is resting on the edge of a lunar crater. The edge of the crat

Question

A 4-kilogram rock is resting on the edge of a lunar crater. The edge of the crater is 150 meters higher than the bottom of the crater. If the rock has 972 joules of gravitational potential energy, how much of this potential energy will it lose if it falls and rolls to the bottom of the crater?

A. 0 J B. 243 C. 486 J D. 972 J A 4-kilogram rock is resting on the edge of a lunar crater. The edge of the crater is 150 meters higher than the bottom of the crater. If the rock has 972 joules of gravitational potential energy, how much of this potential energy will it lose if it falls and rolls to the bottom of the crater? D. 972 J C. 486 J B. 243 A. 0 J

Explanation / Answer

Potential enrgy = mgh

enry lost will be due to the chnage in height

now assuming the potential energy at ground level or at the bottom of the crater is taken as zero as reference the

PE at top of the edge is 972 J

and if it comes to the bottom of the crater descending 150m the energy los will be the same as initial = 972 J

and it will come to ground state

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