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Centripetal Force String Tension
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[QUOTE="Andrew Mason, post: 4680260, member: 15795"] ω is the angular speed in radians per second. There are 2π radians in a circle so if the number of rotations per second is f the angular speed is 2πf. Since T = 1/f you can express ω = 2π/T. Tangential speed v = ωr so mv[SUP]2[/SUP]/r = mω[SUP]2[/SUP]r = m4π[SUP]2[/SUP]r/T[SUP]2[/SUP] Can you see how to use this to compare the centripetal force on each of these two rotating masses? You have provided an excellent example of why getting the right answer is not very important when you are a student. Are the tangential speeds the same for each rotating mass? Can you compare the tangential speeds? (hint: Can you see why using ω makes this a lot easier?) AM [/QUOTE]
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