How fast in rm rpm must a centrifuge rotate if a particle, Ask an Expert

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Q. How fast (in {rm rpm}) must a centrifuge rotate if a particle 8.50 cm from the axis of rotation is to experience an acceleration of 115000 {rm g}'s?

Q. An 82 kg man drops from rest on a diving board 3.0 m above the surface of the water and comes to rest .55s after reaching the water. what is the net force on the diver as he is brought to rest?

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