Question

A mass of $1kg$ is suspended by a string $A$. Another string $C$ is connected to its lower end as shown in figure. If a sudden jerk is given to C, then:

• A. $themasswillstartrotating$
• B. the portion $AB$ of the string will break.
• C. the portion $BC$ of the string will break.
• D. $noneofthestringwillbreak$

Answer 1

The correct option is B the portion $AB$ of the string will break.

Say a force is applied to the string C, and a tension $T$ is developed in it.
For equilibrium of $1kg$ block tension in portion AB will be $(T+1\times g)$

So, the portion AB will always break first.