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Questions  

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

detailed solution

Correct option is 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 throughblock.

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