# Force of Friction Equation?

by paigegail
Tags: equation, force, friction
 P: 22 I think the reason that my problems have arisen is because of my equation for the force of friction. I have Ff= ucosAngle That right?
 Emeritus Sci Advisor PF Gold P: 10,424 The force due to friction: $$F = \mu N = \mu m g$$ Where $\mu$ is the coefficient of friction (either static of kinetic), and $N$ is the normal force. On a horizontal plane, the normal force is just the weight of the object, which is $mg$. - Warren
 P: 115 And to include the angle; $$F_f=\mu mg cos \alpha$$
P: 661

## Force of Friction Equation?

It is the limiting force of friction or say max friction force exerted and f force due to friction depends on the circumstance

For eg moving on a plane surface Chroots Ans is correct and in case if body is on inclined surface Kishtiks Ans is correct
P: 115
 Originally posted by himanshu121 For eg moving on a plane surface Chroots Ans is correct and in case if body is on inclined surface Kishtiks Ans is correct
I love my equation. What is the angle for a plane surface? 0? Then what is cos0? 1? Then what is 1.mu mg? mu mg? Are the two eqs the same?[:)]
P: 640
 Originally posted by himanshu121 It is the limiting force of friction or say max friction force exerted and f force due to friction depends on the circumstance For eg moving on a plane surface Chroots Ans is correct and in case if body is on inclined surface Kishtiks Ans is correct
lol rofl same eq man.
 P: 661 It is not same equation It is the case of the equation under the given conditions only

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