Question

Two masses $1$ kg & $3$ kg are connected by massless string. The string passes over a frictionless pulley. The lighter mass is resting on table. Calculate the force required to keep this mass on table. g= $9.8m/s^2$

• A. $9.8$ N
• B. $19.6$ N
• C. $32.5$ N
• D. $50$ N

Answer 1

The correct option is C $32.5$ N

$\begin{array}{c}F=3g\\ =3\times 9.8N\\ =32.5N\end{array}$

$\therefore$ Option $C$ is correct.