Question

Three blocks A, B and C are suspended as shown in Fig. Mass of each of block A and B is m. If system is in equilibrium, and mass of C is M then

• A. M > 2m
• B. M = 2m
• C. M < 2m
• D. M = 4m

Answer 1

The correct option is C M < 2m

From equation $2Tcos\theta =Mg$

$cos\theta =\frac{Mg}{2mg}=\frac{M}{2m}$
$cos\theta$ < $1\Rightarrow \frac{M}{2m}$ < $1$
$\Rightarrow M$ < $2m$