Question

A man of mass $50kg$ stands on a frame of mass $30kg$ 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. $40g$
• B. $80g$
• C. $30g$
• D. $50g$

Answer 1

The correct option is A $40g$

$40kg$

Formula,

$F=\frac{(M+m)g}{2}$

$=\frac{(30+50)10}{2}$

$=400N$

$\Rightarrow 40kg$