Question:

Driving Couple(Mechanics)?

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A Shaft rotating at 3000 revolutions per minute is transmitting power of 10 kilowatts. Find the magnitude of the driving couple.

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  1. Power (kW)

    =torque (N m) x 2 pi x rotational speed (rpm) / 60000

    where 60,000 comes from 60 seconds per minute times 1000 watts per kilowatt.

    torque (N m)

    =Power (kW)*60000 /  2 pi x rotational speed (rpm)

    =10*60000 / 2 * 3.14 *3000

    =31.85 N.m

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