Thanks, INDIAN ARMY. I could not solve it because by mistake I have considered the box and man together as the system. That way T comes to be 90g or 900N upward. Solving, the normal reaction on the man comes in negative. However the previous post in which U had solved was not mine.
Let us build a new world with love, peace, happiness and engineering! (DON'T CHOOSE THE ODD ONE OUT)
Moderation Team
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