Question

K is the force constant of a spring. The work done in
increasing its extension from l₁ to l₂ will be
(a) K(l₂ – l₁) (b) k/2( l₂+l₁)
(c)K(l₂² - l₁² ) (d) k/2(l₂² - l₁²)

Answer 1

Answer:

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