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?

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(N/A) When the elevator is descending,electrical power is required to control the speed of the lift and prevent it from entering a state of free fall under gravity.
Additionally,as the total weight inside the elevator increases,the gravitational force acting on it increases,which would cause the speed of descent to increase uncontrollably. Therefore,there must be a limit on the number of passengers to ensure the braking system can safely manage the load.

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