With an object sitting at the top of an inclined plane, the static coefficient friction can be calculated with the simplified equation of: μ = tan(θ). In the same way, with an object moving down an inclined plane at constant velocity, the kinetic coefficient of friction can be calculated with the simplified equation μ = tan(θ). How does that make sense if the kinetic coefficient of friction is supposed to be less than the static coefficient of friction? For example, if an object stays still at 15°, but moves at a constant velocity at 20°, the kinetic coefficient of friction will be greater than the static coefficient of friction. How does that make sense?