A mass of 2 kg is suspended with thread AB (Fig.). Thread CD of the sa

1.	A mass of 2 kg is suspended with thread AB (Fig.). 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?
Answer» Thread AB will break. AB, because force on the upper thread will be equal to sum of the weight of the body and the applied force.

A mass of 2 kg is suspended with thread AB (Fig.). 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?

Answer»

Thread AB will break.

AB, because force on the upper thread will be equal to sum of the weight of the body and the applied force.