The collar, which has a weight of 3 lb, slides along the smooth rod lying in the horizontal plane and having the shape of a parabola, r = [4/(l - cosθ)] ft, where θ is in radians. If the collar’s angular rate is constant and equals θ̇ = 4 rad/s, determine the tangential force P needed to cause the motion, and the normal force component that the collar exerts on the rod at the instant θ = 90°.

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