Question

Two bodies of mass 4 kg and 6 kg are attached to the ends of a string passing over a pulley. The 4 kg mass is attached to the table top by another string. The tension in this string $T_1$ is equal to (take $g=10m/s^2)$

• A. 20 N
• B. 25 N
• C. 10.6 N
• D. 10 N

Answer 1

Answer: (A)

20 N

T = mg , here m = 6kg therefore:
$T=60$ N
$T=T_1+40$
Equating forces on 4kg body we get:

$\Rightarrow 60=T_1+40$
$\Rightarrow T_1=20$ N