Question

Three equal weights of mass 2 kg each are hanging on a string passing over a fixed pulley as shown in the fig. What is the tension in the string connecting the weights Band C?

• A. Zero
• B. 13N
• C. 303M
• D. 19.6N

Answer 1

The correct option is B 13N

All blocks have the same acceleration.

For block A,

$T_2-2g=2a$

For block B,

$T_1+2g-T_2=2a$

For block C,

$2g-T_1=2a$

Adding the three equations gives,

$2g=6a$

i.e $a=\frac{g}{3}$

Substituing this value in equation for block C,

gives $T_1=13N$