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17 February, 16:09

How much work (in J) is done against the gravitational force on a 3.9 kg briefcase when it is carried from the ground floor to the roof of the Empire State Building, a vertical climb of 380 m?

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  1. 17 February, 17:59
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    W = 14523.6 J

    Explanation:

    Given,

    Mass = 3.9 Kg

    Vertical height, h = 380 m

    Work done against gravitational force

    W = m g h

    g is acceleration due to gravity

    W = 3.9 x 9.8 x 380

    W = 14523.6 J

    Hence, the work done by the gravitational force is equal to W = 14523.6 J
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