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Coefficient of Kinetic Friction Question

by wilson_chem90
Tags: coefficient, friction, kinetic
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wilson_chem90
#1
Mar29-09, 02:27 PM
P: 137
1. If the acceleration of a pair of boxes has a magnitude of 2.5m/s^2, determine the smallest coefficient of friction between the boxes that will prevent slippage.



2. Relevant equations
F = ma
Fk = ukFn
Fw = mg


3. The attempt at a solution

ma = uk mg(Fn)
a = uk g
a/g = uk
2.5m/s^2 / 9.8m/s^2 = uk
uk = 0.25
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LowlyPion
#2
Mar29-09, 02:32 PM
HW Helper
P: 5,343
Since you don't want it to slip, it's really the coefficient of static friction you are interested in, but as to your solution, that looks like the right method.
wilson_chem90
#3
Mar29-09, 02:34 PM
P: 137
oh okay, so its the same format just static friction?

LowlyPion
#4
Mar29-09, 03:03 PM
HW Helper
P: 5,343
Coefficient of Kinetic Friction Question

Quote Quote by wilson_chem90 View Post
oh okay, so its the same format just static friction?
Correct.

μs not μk

No big deal.


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