Lemma
MediumApplications of integrals
Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §8.6 Force, Work, and Energy, #15 · Calculus · Applications of integrals

A rectangular dam is 40 feet high and 60 feet wide

A rectangular dam is 40 feet high and 60 feet wide. Compute the total side force on the dam when (a) the water is at the top (b) the water level is halfway up.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §8.6 Force, Work, and Energy, #15

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