Question

When the cab is carrying its maximum capacity, at what average rate must the motor deliver energy to get the cab up to cruising speed?

Answer 1

A motor must lift a 1400-kg elevator cab. The cab's maximum occupant capacity is 400 kg, and its constant "cruising" speed is 1.6m/s . The design criterion is that the cab must achieve this speed within 2.0 s at constant acceleration, beginning from rest.