Question

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

Answer 1

The correct option is B The portion BC of the string will break

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.