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A thin rod with mass M = 5.00 kg is bent in a semicircle of radius R = 0.650 m (Fig. 13-56). (a) What is its gravitational force (both magnitude and direction on a particle with mass m = 3.0 × 10-3 kg at P, the center of curvature? (b) What would be the force on the particle if the rod were a complete circle?
Figure 13-56 Problem 99.
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