Question

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

• A. the portion $AB$ of the string will break
• B. the portion $BC$ of the string will break
• C. none of the strings will break
• D. the mass will start rotating

Answer 1

Answer: (B)

When a sudden jerk is given to $C$, an impulsive tension exceeding the breaking tension develops in $C$ first, which breaks before this impulse can reach $A$ as a wave through block