A nonuniform thin rod of length L lies on the x axis. One end of the rod is at the origin, and the other end is at x=L. the rod's mass per unit length λ varies as λ=Cx, where C is a constant.(Thus, an element of the rod has mass dm=λ dx.) (a) Determine the total mass of the rod. (b)Determine the gravitational field due to the rod on the x axis at x=x0, there x0 >L.

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