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QUESTION
A 70kg man stands on a spring scale in a lift. At some instant,he finds that the scale reading has changed from 70kg to 65kg for a while and then...
A 70kg man stands on a spring scale in a lift. At some instant,he finds that the scale reading has changed from 70kg to 65kg for a while and then comes back to original mark. What can be concluded by this observation ?
