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Homework Help: Centrip Force and Coef. of Friction

  1. Feb 24, 2005 #1
    Can someone help me on these problems?

    Centrip Force prob.
    A yoyo is whirled around in a circle over some yoyo’s head. The string will break if the force is greater than 10 N. If the mass of the yoyo is 200 g and the length of the string is 0.5 m, what is the maximum velocity of the yoyo?

    The Coeffient/Centrip Force prob.
    A car is going around a curve with a radius of 100 m. That is the maximum velocity of the car if the coefficient of friction is 0.5?
  2. jcsd
  3. Feb 24, 2005 #2
    What have you done so far?
  4. Feb 24, 2005 #3
    how about using [tex]F_{centripetal} = \frac{mv^2}{r}[/tex]

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