Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §8.6 Force, Work, and Energy, #13 · Calculus · Applications of integrals

It takes 20 foot-pounds of work to stretch a spring 2 feet

It takes 20 foot-pounds of work to stretch a spring 2 feet. How much work to stretch it one more foot?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §8.6 Force, Work, and Energy, #13

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