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4-1.Newton's Laws of Motion
medium
A mass of $1 kg$ is suspended by a string $A$. Another string $C$ is connected to its lower end (see figure)., if the string $C$ is stretched slowly, then
A
The portion $AB$ of the string will break
B
The portion $BC$ of the string will break
C
None of the strings will break
D
None of the above
Solution
(a)When the spring $C$ is stretched slowly, the tension in $A$ is greater than that of $C$, because of the weight mg and the former reaches breaking point earlier.
Standard 11
Physics
