Q: How many joules of 20 kg box is lifted 5 meters?

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100

100 x 3 = 300 joules

The work done is stored as potential energy of the box P=Mgh F=Ma (a=g) F=Mg h=5m Therefore the work done is 20*5 = 100 joules -----------------------------------------------------------------------------------------------------

Work = force x displacementW = Fd W = 100N x 3m W = 300J 300 joules of work is done on the box.

A joule is a neuton metre. i.e. 10*5 = 50 joules are required.

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100

If a 100 N box is lifted 3 meters off the ground, the answer is 300 joules.

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If a 100 N box is lifted 3 meters off the ground, the answer is 300 joules.

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100 x 3 = 300 joules

100

The work done is stored as potential energy of the box P=Mgh F=Ma (a=g) F=Mg h=5m Therefore the work done is 20*5 = 100 joules -----------------------------------------------------------------------------------------------------

Work = force x displacementW = Fd W = 100N x 3m W = 300J 300 joules of work is done on the box.

Work = force x displacementW = Fd W = 100N x 3m W = 300J 300 joules of work is done on the box.

A joule is a neuton metre. i.e. 10*5 = 50 joules are required.

The potential energy is 147 joules.