"It takes 100J of work to stretch a spring 0.5m from its equilibrium position. How much work is needed to stretch it an additional 0.75m."(adsbygoogle = window.adsbygoogle || []).push({});

Attempt: w = ⌠_{a}^{b}F(x)dx

work = F x D

100J = F x 0.5m

F = 200J

0.75 + 0.5 = 1.25

w = ⌠_{0.5}^{1.25}200dx

w = 150 J

The correct answer: w = 525 J

what did I do wrong? Thanks!

Nevermind, I found the exact problem online, so sorry!

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# I Work Problem

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