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A 5.0 g coin is placed 15 cm from the center of the turntable. THe coin has static and kinetic coefficients of friction with the turntable surface of us=.8 and uk=.5. THe turntable very slowly speeds up to 60 rpm. Does the coin slide off?
15 years ago

Answers

MathMate
Centrifugal force, Fc
= mrω²
r=0.15m
m=0.005kg
ω=60 rpm
=60*2*π/60s
= 2π s<sup>-1</sup>

Static frictional force, Fs
= mμ<sub>s</sub>

<b>If</b> Fc>Fs, the coin will slide off, since μ<sub>s</sub> > μ<sub>k</sub>.

15 years ago
Chud master
answer is actually no
14 years ago

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