Coefficient of Kinetic Friction Question

wilson_chem90

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

LowlyPion

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

oh okay, so its the same format just static friction?

LowlyPion

Correct.

μ_s not μ_k

No big deal.