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A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted? Acceleration due to gravity is g = 9.8 m/s2. A.6.9 m B.0.…

A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted? Acceleration due to gravity is g = 9.8 m/s2. A.6.9 m B.0.…
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A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted? Acceleration due to gravity is g = 9.8 m/s2.

A.6.9 m B.0.15 m C.3.2 m D.0.7 m

User Grief
by
8.5k points

1 Answer

5 votes
PE = mgh
54.9 J = (8 kg)(9.8 m/s²)h
h = 0.7 m
User Scott Coldwell
by
7.6k points
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