Q.

A man is standing on a spring platform, reading of spring balance is 60 kg.wt. If man jumps outside the  platform then reading of the spring balance.            

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a

Remain same

b

Decreases

c

First increases then decreases to zero

d

Increases

answer is A.

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Detailed Solution

For jumping he presses the spring platform, so the reading of spring balance increases first and finally it becomes zero.
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