1.

A man of mass 50 kg carries a bag of weright 40N on his shoulder. The force with which the floorpushes up his feet will be(A) 882 NN(C) 90 N(B) 530 N(D) 600 N

Answer»

Given, Weight = 40N and mass= 50 Kg.

We know that, F=ma

40N = m x g

40/g = m

40/10 = m

4kg = m

mass = mass of man + mass of bag

= 50 + 4

= 54 kg

Force with which the floor pushes up his feet, F = ma

F = 54 x g

F = 54 x 10

~= 540N.

so option(b) is the correct answer



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