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Mirole
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Homework Statement
A 6.40 g coin is placed 16.0 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of mu_s = 0.890 and mu_k = 0.540.
What is the maximum angular velocity with which the turntable can spin without the coin sliding?
Homework Equations
The Attempt at a Solution
Fnet(x)= n + fs + fg = ma
= fs = ma
Fnet(y)=n+fs+fg=0
= n = mg
ma = mu_s(mg)
.0064m(a) = (.890)(.0064kg * 9.8)
a = 8.722 m/s^2
a=v2/r
8.722=v2/.16
v = 1.181 m/s
I'm supposed to change it to rad/s, but I have no idea on how to do that or even if I did it correctly.
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