Question

System shown in figure is in equilibrium and at rest. The spring and string are massless, now the string is cut. The acceleration of mass $2m$ and $m$ just after the string is cut will be:

• A. $\frac{g}{2}$ upwards, $g$ downwards
• B. $g$ upwards, $\frac{g}{2}$ downwards
• C. $g$ upwards, $2g$ downwards
• D. $2g$ upwards, $g$ downwards

Answer 1

The correct option is A $\frac{g}{2}$ upwards, $g$ downwards

$\therefore acc⟹a_A=\frac{3mg-2mg}{2m}=\frac{g}{2};a_B=g$