1.

A person of weight W jumps to ground with his legs fixed and comes to rest with an upward acceleration of 3 g. (g = acceleration due to gravity). The force exerted by him during landing is: (1) W (2) 2W (3) 3W (4) 4W

Answer»

(4) 4W 

N – W = m (3g) ; W = mg 

N = 4W



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