- #1
Priscilla
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Homework Statement
A small block sits 0.15 m from the center of a horizontal turntable whose frequency of rotation can be smoothly increased. If the coefficient of static friction between the block and the turntable is 0.55, at what frequency will the block begin to slide off? (Draw a force diagram).
Homework Equations
f_s = U_s F_n
F = ma
a = v^2/R
The Attempt at a Solution
f_s = U_s F_n
-f_s = ma
a = -f_s/m = -(U_s mg)/m = -U_s g
a = v^2/R
-U_s g = v^2/R
v = Sq rt(-R u_s g)
I am not sure what the question is really asking. What's frequency? Is it velocity?
I attached a force diagram.