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

A mass of `2kg` is suspended with thread `AB` (figure) Thread `CD` of the same type is attached to the other end of `2kg` mass. Lower thread is pulled gradually, harder and harder in the downward 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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The thread `AB` will break earlier than the thread `CD` This is becase force on `CD` = applied force `f` on `AB =f` plus force due to 2 kg weight as shown in .
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