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Why is electrical power required at all when the elevator is descending? Why should there be a limit on the number of passengers in this case?
Answers (1)
When the elevator is descending, it is a condition of free fall due to the force exerted by gravity. But, in order to control the speed of the elevator and so that it moves at a uniform speed while descending, power is needed. There is a limit on the number of passengers as when the number of passengers increases, more power is required to stop the elevator from the condition of free fall. Since the power of the motor system is limited, the number of passengers which can travel at one time also has a limit.
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