As seen in Fig. 13-35, two spheres of mass m and a third
Chapter 13, Problem 11(choose chapter or problem)
As seen in Fig. 13-35, two spheres of mass m and a third sphere of mass M form an equilateral triangle, and a fourth sphere of mass m4 is at the center of the triangle. The net gravitational force on that central sphere from the three other spheres is zero. (a) What is M in terms of m? (b) If we double the value of m4, what then is the magnitude of the net gravi- 111 tational force on the central sphere?
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