- #1
Umphreak89
- 6
- 0
A 5.0 g coin is placed 22 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of µs = 0.80 and µk = 0.50. What is the maximum rpm that the turntable could speed up to without the coin sliding off?
m = .005 kg
r = .22 m
µs = 0.8
Equations found..
v = angular velocity * r
Force(net) = m(v)^2 / r
Inertia > µs N when coin slips (?)
I believe this gets set equal to mg (Normal Force) but I haven't been able to generate the correct answer multiplying µs as a coefficient of either side.
I'm not sure what isn't being accounted for, what do I do?
m = .005 kg
r = .22 m
µs = 0.8
Equations found..
v = angular velocity * r
Force(net) = m(v)^2 / r
Inertia > µs N when coin slips (?)
I believe this gets set equal to mg (Normal Force) but I haven't been able to generate the correct answer multiplying µs as a coefficient of either side.
I'm not sure what isn't being accounted for, what do I do?