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A mass of 2 kg suspended with thread AB ...

A mass of 2 kg suspended with thread AB (figure). Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward direction, so as to apply force on AB.
Which of the threads will break and why ?

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Verified by Experts

Here force acting on AB part of thread force acting on CD plus weight of 2 kg block .Hence total force on Ab part is more than net force on CD hence thread AB will break earlier.
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