A mass of 2, kg is suspended from a rigid sup | vedclass

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Question

(B) When the lower thread $CD$ is pulled with a sudden jerk,the force applied is impulsive and acts only on the lower thread $CD$. Due to the inertia

Vedclass · Accepted Answer

Thread $CD$ breaks.

Vedclass · Answer

(B) When the lower thread $CD$ is pulled with a sudden jerk,the force applied is impulsive and acts only on the lower thread $CD$. Due to the inertia of the $2\, kg$ mass,it does not immediately move downwards to transmit the force to the upper thread $AB$. As a result,the tension in the lower thread $CD$ exceeds its breaking strength almost instantaneously,causing it to break. The upper thread $AB$ remains unaffected because the force does not have enough time to be transmitted to it. Therefore,the correct option is $B$.

$A$ mass of $2\, kg$ is suspended from a rigid support by a thread $AB$. Another thread $CD$ of the same type is attached to the lower end of the $2\, kg$ mass. If the lower thread $CD$ is pulled with a sudden jerk,what happens?

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