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17 August, 19:56

Work = force x distance

Power = work / time

745 watts = 1 hp

A tow truck is hired to pull out a 2000 Kg Car from a 10 meter deep ditch straight up and place it on the level ground. If the work is completed by the truck in 5 seconds Calculate horse power of the truck.

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  1. 17 August, 20:24
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    horse power of the truck 39,000 kgm²s⁻³

    Explanation:

    Calculate horse power of the truck.

    Work = force x distance

    where, force = mg = 2000 kg x 9.8 m/s² = 19,600 kgm/s²

    distance = 10 meter

    Work = 19,600 kgm/s² x 10 meter

    = 196,000 kgm²s⁻²

    Power = work / time

    = 196,000 kgm²s⁻² / 5 seconds

    = 39,000 kgm²s⁻³
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