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a crane lifts a metal beam with a mass of 1350 kg. Calculate the amount of work done against gravity if the beam is lifted 37.5 meters in the air.

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    W = F*h.

    F = m*g = 1350kg * 9.8N/kg = 13,230 N.

    W = 13230 * 37m = 489,510 J.

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