A stone is suspended by a thread from a rigid support. Another thread is attached at the bottom of the stone If the lower thred is pulled suddenly which thread - upperor lawer - does break ? If the lower thread is pulled slowly which thread - upper or lower - does break?

A stone is suspended by a thread from a rigid support. Another thread

1.	A stone is suspended by a thread from a rigid support. Another thread is attached at the bottom of the stone If the lower thred is pulled suddenly which thread - upperor lawer - does break ? If the lower thread is pulled slowly which thread - upper or lower - does break?
Answer» Solution :Lower threadsince the applied force is not TRANSMITTED to the upper THREAD due to inertia . Upper thread SINCE the force applied will be transmitted to the upper thread and the total force on it is the sum of the applied force and the WIEGHT of the stone .