Q.
A mass of $1\ kg$ is suspended by a string $A$. Another string $C$ is connected to its lower end (see figure). 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
Explanation
(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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.