Match the following formulas about calculating friction:

Last updated: 7/10/2022

Match the following formulas about calculating friction: Always works. FN can be found by summing all the y-dir forces, recognizing that the acceleration in the y-dir is (probably) zero, and solve for FN Works whenever the surface is horizontal and there are no y-direction forces except for gravity and the normal force Works whenever the surface is an inclined plane and there are no y-direction forces except for gravity and the normal force 1. Ff = μmg 2. Ff= μmg cos θ 3. F₁ = μ FN