Q13 of 21 Page 109

A man of mass 50 kg carries a bag of weight 40N on his shoulder. The force with which the floor pushes up his feet will be?

Weight of bag = 40N

G x mass of bag = 40 N


Where g = acceleration due to gravity = 9.8 ms–2


m1 = mass of bag




m2 = mass of man = 50 kg


total mass of man and bag system = (50 + 4.08) kg


= 54.08 kg


Free body diagram



Where,


The N = Normal reaction that floor applies at static equilibrium.





Hence, the force with which the floor pushes up the feet = 530 N


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