Answer:
Power output =
Explanation:
Given:
Mass of the elevator is,
Height to which it is raised is,
Acceleration due to gravity is,
Time taken by the motor to raise the elevator is,
Now, work done on the elevator by the motor is equal to the increase in the gravitational potential energy of the elevator.
Increase in gravitational potential energy is given as:
Therefore, work done by motor is,
Now, we know that, power is work done in unit time. So, power output is given as:
Therefore, the power output of the first motor is