Question
Question: A boy of mass 40 kg stands in a frame of mass 360 kg. He pulls on a light rope which passes over a p...
A boy of mass 40 kg stands in a frame of mass 360 kg. He pulls on a light rope which passes over a pulley. The other end of the rope is firmly attached to the frame. What force should be exerted by the boy on the rope for the system to be in equilibrium ?
A
40 g
B
400 g
C
200 g
D
100 g
Answer
200 g
Explanation
Solution
2T = (m1 + m2)g ̃ 2T = 400g ̃ T = 200g