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strongA straight rod of length L extends from x=a to x=L+a. The gravitational force it exerts on...
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strongA straight rod of length L extends from x=a to x=L+a. The gravitational force it exerts on a point mass m at x=0, if the mass per unit length of the rod is A+Bx/strongsupstrong2/strong/supstrong, is given by/strongstrong-/strong