Work, Power and EnergyHard

Question

A spring of force constant k is cut into two pieces such that one is double the length of the other. Then the long piece will have a force constant of

Options

A.(2/3) k
B.(3/2) k
C.3 k
D.6 k

Solution

l1 = 2l1      ∴ l1 = l
force constant k ∝

∴ k1 = k

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