Question

A 25 kg rock , is raised to the top of a hill 10 m high. What is the PE of the rock ?

Answer 1

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$Potential \: \: Energy =(mass) \times (gravity \: acceleration) \times (height)$

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If gravity acceleration is 10 :

$PE = 25 \times 10 \times 10$

$PE = 2500$

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If gravity acceleration is 9.8 :

$PE = 25 \times 9.8 \times 10$

$PE = 25 \times 98$

$PE = 2450$

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