Lemma
EasyApplications of integrals
Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §8.6 Force, Work, and Energy, #6 · Calculus · Applications of integrals

A rocket burns its 100 kg of fuel at a steady rate…

A rocket burns its 100 kg of fuel at a steady rate to reach a height of 25 km.
(a) Find the weight of fuel left at height .
(b) How much work is done lifting fuel?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §8.6 Force, Work, and Energy, #6

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