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Question

Two springs have their force constants as K1 and K2 (K1>K1). The work done when both are stretched by same amount of length will be :

A
equal
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B
greater for K1
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C
greater forK2
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D
given data is incomplete
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Solution

The correct option is A greater for K1
When the two springs are structed by same amount say x, then
W1W2=12K1x212K2x2=K1K2

given K1>K2

hence W1W2=K1K2>1 W1W2>1

W1>W2 so, (B) is correct option
so greater for K1 spring

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