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Question
Two springs of force constants K1 and K2 (K1> K2) are stretched by same force. If W1 and W2 be the work done stretching the springs then......
Options
W1=W2
W1<W2
W1>W2
W1=W2=0
Solution
W1<W2
F1 = K1x1 and F2 = K2x2
Force is same
∴ K1x1=K2x2
∴x1<x2 ........(K1>K2)
Work done, `W_1=1/2K_1x_1^2 and W_2=1/2K_2x_1^2`
∴W1<W2 .........(K1>K2 and x1<x2)
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