A certain elevator car has mass 2200 kg and is lifted by cables driven by an electric motor. The efficiency of the lift system (motor, pulleys, cable, etc.) is 67.0%. As the elevator car moves at constant speed of 3.0 m/s it encounters 220N of friction coming from its tracks. Determine the electrical power requirement for this system as it lifts the car.

Question

A certain elevator car has mass 2200 kg and is lifted by cables driven by an electric motor.  The efficiency of the lift system (motor, pulleys, cable, etc.) is 67.0%.  As the elevator car moves at constant speed of 3.0 m/s it encounters 220N of friction coming from its tracks.  Determine the electrical power requirement for this system as it lifts the car.

bobpursley · Answer

what is 1/.67 *( 2200*g+220)3 watts

Anonymous · Answer

Calculate the number of joules of kinetic energy a 1kg parrot has when it flies at 6 m/s