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Q. Two charged dust particles exert a force of 8.3 x10-2 N on each other. What will be the force if they are moved so they are only one fifth as far apart?

Q. A diving board of length 3.00m is supported at a point 1.00m from the end, and a diver weighing 520m stands at the free end . The diving board is of uniform cross section and weighs 270 m.

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