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What is the work done by the weight (gravitational force) of the box?

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A 30-N box is pulled 6.0 m up along a 37 degree inclined plane. What is the work done by the weight (gravitational force) of the box?

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  1. The weight is 30N downwards, and moves vertically upwards distance 6.0 sin(37) m.

    The work is therefore:

    - 30 * 6.0 sin(37)

    = - 108.3 J.

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