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5 February, 02:59

A luxury liner has a diesel-electric powerplant with a maximum power of 83 MW at a cruising speed of 39.4 knots. What forward force is exerted on the ship at this speed?

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  1. 5 February, 03:01
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    4.09 MN

    Explanation:

    P (max) = 83 MW

    Speed = 39.4 knots

    1 knot = 1.852 km/h

    Speed in km/h = 39.4 * 1.852

    = 72.9688 km/h

    = (72.9688*1000) / 3600

    = 20.27 m/s

    The exerted force is F

    P = Fv

    P = |F| |v| cos α

    P = |F| * 20.27cos 0

    P = 20.27F

    F = (83 * 10^6) / 20.27

    F = 4.09 * 10^6

    F = 4.09MN
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