Question

Consider the system shown in figure. The pulley and the string are light and all the surface are frictionless. The tension in the string is (Take g $=10{m/s}^2$):

• A. 0 N
• B. 1 N
• C. 2 N
• D. 5 N

Answer 1

The correct option is D 5 N

For the surface block, tension $T=1\times a=a$ where $a=$ acceleration of the system.
For hanging block, $1.a=1.g-T$
$T=g-a=g-T$
$2T=g$

$T=5N$