Question
A spring having a spring constant $‘K’$ is loaded with a mass $‘m’$. The spring is cut into two equal parts and one of these is loaded again with the same mass. The new spring constant is
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Answer
(c) Spring constant $(k) \propto \frac{1}{{{\rm{Length \,of \,the \,spirng\, (}}l{\rm{)}}}}$ as length becomes half, $k$ becomes twice is $2k$.
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