An electric motor is used to lift an elevator and its load (total 1500Kg) to a height of 20 m - Physics - Work Energy And Power

Question

An electric motor is used to lift an elevator and its load
(total 1500Kg) to a height of 20
m The time taken for the job is 20 Sec The efficiency of the motor
is 75% (i) What isthe work done? (ii) What is the rate at which
work is done? (iii) At what rate is theenergy supplied to the
motor?

Himanshu · Accepted Answer

An electric motor is used to lift an elevator and its load (total 1500Kg) to a height of 20m. The time taken for the job is 20 Sec. The efficiency of the motor is 75%. (i) What isthe work done? (ii) What is the rate at which work is done? (iii) At what rate is theenergy supplied to the motor?

An electric motor is used to lift an elevator and its load (total 1500Kg) to a height of 20
m. The time taken for the job is 20 Sec. The efficiency of the motor is 75%. (i) What isthe work done? (ii) What is the rate at which work is done? (iii) At what rate is theenergy supplied to the motor?