1.

An elevator is provided with a weighing machine ( making use of principle of spring balance ) at its floor . A man weighing 60 kg stands on the platform of the machine and finds that the reading shoots to 62 kg when the elevator starts and then comes down to 60 kg again. How do you explain this ?

Answer»


Answer :INITIALLY moves with acceleration `0. 33 MS^(-1)` and then at a CONSTANT upward SPEED


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