Question

A man of mass 50 kg stands on a frame of mass 30 kg. He pulls on a light rope which passes over a pulley. The other end of the rope is attached to the frame. For the system to be in equilibrium what force man must exert on the rope?

• A. $40\times g$
• B. $80\times g$
• C. $30\times g$
• D. $50\times g$

Answer 1

The correct option is A $40\times g$

Taking man & frame in system we get

$2F=800$

$F=400ml$

$=40g$

Hence, the option $A$ is the correct answer.