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Problem G.4: Gravitational Force of Ring

force of ring on mass

A ring of radius R = 105 cm is made of a thin wire of radius r = 8 mm. If the density of the material is = 4200 kg/m3, what will be the maximum gravitational force exerted by this ring on a particle of mass m = 4 kg placed on the axis of the ring?

Answer: x 10-14 N.

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