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Three balls, with masses of 4m, 2m, and m, are equally spaced along a line. The spacing between neighboring balls is r. We can arrange the balls in three different ways, as shown in the figure. In each case, the balls are in an isolated region of space very far from anything else 2m 2m (a) Rank the three cases, from largest to smallest, based on the magnitude of the net gravitational force experienced by the ball with the mass of 4m. (Use only > o = symbols. Do not include any parentheses around the letters or symbols.) 1 3 2 (b) If m is 7.00 kg and r is 70.0 cm, calculate the magnitude and direction of the net gravitational force acting on the ball with the mass of 4m in case 2. Define the positive direction as pointing to the right, so your answer should have a positive sign if the net force is directed right, and a negative sign if the net force is directed left. 1334e-8 XN Additional Materials Section 8-1: Newtons Law of Universal Gravitation eBook

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20% Lim 20名구 9 (0 70)2

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