Question

An electric motor uses 670 kJ of electrical energy to generate 595 kJ of mechanical kinetic energy. What is the efficiency of the motor?

Full example, please...
Thank you!

Answer 1

• Used energy=595KJ
• Total energy=670KJ

Efficiency:-

`\\ \tt\longmapsto \frac{595}{\cancel{670}}* \cancel{100}`

`\\ \tt\longmapsto (595)/(67)* 10`

`\\ \tt\longmapsto 8.88(10)`

`\\ \tt\longmapsto 88.8\%`