A quarter horse power motor runs at a speed of 600 Ep.m. Assuming 40% efficiency the work done by the motor in one rotation will be:

A quarter horse power motor runs at a speed of 600 Ep.m. Assuming 40%

1.	A quarter horse power motor runs at a speed of 600 Ep.m. Assuming 40% efficiency the work done by the motor in one rotation will be:
Answer» 7.46 J 7400 J 7.46 ergs 74.6 J Solution :Here, speed of motor =`(600)/(60)=10 r.p.s` POWER of motor=`1/4hp=(746)/(4)W` EFFECTIVE power=`(40)/(100)xx(746)/(4)=74.6 W` `Work W=("Effecttive powre")/("No. of rotations/sec")` =`(746)/(10)=7.46 J`.

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A quarter horse power motor runs at a speed of 600 Ep.m. Assuming 40% efficiency the work done by the motor in one rotation will be:

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