A mass of 1kg 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

Options

A. The portion AB of the string will break
B. The portion BC of the string will break
C. None of the string will break
D. The mass will start rotating

Answer

B

Explanation

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.