Question

A 500 kg elevator starts from rest. It moves upward for 3.0 sec with constant acceleration until it reaches its cruising speed of
3m/sec. Neglect friction.
(A)
Average power of elevator motor during the period of acceleration is 24.75 KW
(B)
Power of the motor when it moves at it cruising speed is 15 KW
(C) Power of gravity remains constant throughout the motion
(D) Sum of the work done by all the forces on the elevator during first use of its motion is 2.25 KW.​

Answer 1

Answer:

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