Force of Friction Equation?

[paigegail]

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?

[chroot]

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

[kishtik]

And to include the angle;

F_f=\mu mg cos \alpha

[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

[kishtik]

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?[:)]

[PrudensOptimus]

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.

[himanshu121]

It is not same equation

It is the case of the equation under the given conditions only