An elevator is pulled upward so it moves with increasing upward speedthe force e

Question

An elevator is pulled upward so it moves with increasing upward speedthe force exerted by the cable on the elevator is constant and greater than the downward gravitational force exerted by Earth. When the elevator is moving up medium-fast, the force exerted by the cable on the elevator changes abruptly to just balance the downward gravitational force of Earththe sum of the forces that the cable and Earth exert on the elevator is now zero. Solving this problem, your friend says that the elevator will stop if the two forces have equal magnitudes.

A) Why would he think this way? Do you agree with his opinion? If you disagree, how would you convince him that he is incorrect? (Please write a short paragraph)

Explanation / Answer

when the forces becomes equal , net force on the elevator becomes 0 and hence the acceleration is 0

Zero acceleration means that the elevator will continue to move at a constant speed. the elevator will not stop since to stop it , we need negative acceleration or a force , but here there is no net force to stop the elevator , hence elevator will not stop.

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