Question

A body of mass $50kg$ is pulled by a rope of length $8m$ on a surface by a force $108N$ applied at the other end. The linear density of the rope is $0.5kg/m$. The force acting on $50kg$ mass is

• A. $50N$
• B. $100N$
• C. $150N$
• D. $200N$

Answer 1

The correct option is B $100N$

The correct answer is B.

Mass of the rope =$8\times \frac{1}{2}$=4kg

Total mass$=50+4=54kg$

$a=\frac{f}{m}$

=$\frac{108}{54}$

=$2m/s^2$

Force utilised in pulling the rope = $4\times 2$

Force applied on the mass = $108-8=100N$