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OpenStudy (anonymous):

An object having a mass of 2.0 kilograms falls from a height of 15 meters. What is its kinetic energy when it hits the ground?

OpenStudy (noelgreco):

What is its gravitational potential energy before it falls?

OpenStudy (anonymous):

0 When it reaches ground, its no more moving. so the kinetic energy is 0

OpenStudy (noelgreco):

That's right, but what is the PE before it falls? There's a formula for that.

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