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Q. A rectangular barge, 5 m long and 2 m wide, floats in fresh water. How much deeper would it go if there were a 500kg horse on it?

Q. Two spheres of mass m and a third sphere of mass M form an equilateral triangle, and a fourth sphere of mass mB is at center of the triangle. The net gravitational force on mB from the three other spheres is zero. (Use any variable or symbol stated above along with the following as necessary: g.)

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