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[" A rope of length I has its "],[" line...

[" A rope of length I has its "],[" linear mass density "rho],[" varying with distance from "],[" end "A" as "rho=rho_(1)+rho_(2)x" ."rho_(1)& rho_(2)],[" are positive constants.It "],[" moves under the influence of "],[" a force "F" .The force exerted "],[" by the half "BC" on the half "AC],[" is "],[A],[qquad [N],[x]]

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