A mass of 1 kg is suspended by a string A. another string C is connected to its lower end (see figure). If the string C is stretched slowly, then

Options

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

Answer

C

Explanation

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