Circular Motion (1 Viewer)

[Jackson18]

G'day,

In Terry Lee's book in the section about banked curves when there is a frictional force it talks about a proportional representation between the normal force and the frictional force.

Yet no where I have read how do you find out what the proportion is. If anyone could help out that would be greatly appreciated.
Cheers
Jackson

 

[ND]

They usually give you the coefficient of friction.

 

[stevensonn]

In the book Lee's solutions jump to an equation something along these lines and then simply substitute in a value for u where N(Normal Reaction)=uF. How do I find u?

v^2/gr=((sin (theta) + ucos(theta))/cos (theta) + usin(theta))

 

[ND]

You can't get a numerical value for it without having been given values for v, r and the angle.

 

[freaking_out]

Originally posted by stevensonn
In the book Lee's solutions jump to an equation something along these lines and then simply substitute in a value for u where N(Normal Reaction)=uF. How do I find u?

v^2/gr=((sin (theta) + ucos(theta))/cos (theta) + usin(theta))

tell us which page/question...so i can have a look.