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
Correct Answer: B
Solution :
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.
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