A spring with 10 coils has spring constant k . It is exactly cut into two halves, then each of these

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13.Oscillations

easy

A spring with $10$ coils has spring constant $k$. It is exactly cut into two halves, then each of these new springs will have a spring constant

A

$k/2$

B

$2k$

C

$3k/2$

D

$3k$

Solution

(b) $K \propto \frac{1}{l}$ ==> $K\,l = K' \times \frac{l}{2}$ ==> $K' = 2K$

Standard 11

Physics

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