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Springs

Two springs o...

Question

Two springs of spring constant k and 2k are joined together in series. The net spring constant is

A

3k

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B

k/3

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C

2k/3

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D

k

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Solution

The correct option is C 2k/3
When two springs are joined together, then net spring constant $k_{e f f} = k (2 k) / (2 k + k) = 2 k / 3$
The correct option is (c)

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