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A 20 kg box has 1000 joules of potential energy on a shelf. How high is the shelf?
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A 20 kg box has 1000 joules of potential energy on a shelf. How high is the shelf?

User Floam
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6 votes
Formula: PE = mgh
m = 20 kg, g = 9.8 m/s^2 h= ?
1000 = 20 * 9.8 * h
1000 = 196h
h = 5.10204082
The height is around 5m
User Luckystars
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