An object with a mass of #8 kg# is on a plane with an incline of # - pi/6 #. If it takes #9 N# to start pushing the object down the plane and #4 N# to keep pushing it, what are the coefficients of static and kinetic friction?
The static friction coefficient is #0.13# and kinetic friction is #0.05#.
#mu mgcostheta#=maximum force by which the thing is about to move.