For every 100 J of energy supplied to a motor, 80 J of useful work is done. Calculate the efficiency of the motor. Give your answer as a percentage.

asked Jun 5, 2022 2.4k views

5 votes

For every 100 J of energy supplied to a motor, 80 J of useful

work is done. Calculate the efficiency of the motor. Give your
answer as a percentage.

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1 vote

Answer:

80%

Step-by-step explanation:

efficiency = (useful work out / total energy in) x 100

=
(80)/(100) x 100

= 80%

Suku answered Jun 11, 2022

by Suku

7.9k points

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