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Q. A man is standing on a spring platform. Reading of spring balance is $60\, kg\, wt$. If man jumps outside from the platform then the reading of spring balance will:

Uttarkhand PMTUttarkhand PMT 2005

Solution:

When the man jumps from the platform, first the platform goes down with some force and after some ups and downs it will stop. Hence, the reading of spring balance first increases then decreases to zero.