alms24sebring wrote:probably the v^2/r. Isnt there a sin/cos theta in there somewhere?
In a banked turn, yes.
Sorry, I confused things slightly ... I was talking about lateral acceleration on a non-banked turn. Where the following equation holds (sorry for the geek factor, but this is a Science forum after all!
u*m*g=m*(v^2/r) at the point of slipping.
And, m cancels out ... as noted by the OP.
By the way, lateral acceleration is simply (v^2/r) and it is simply F = ma that leads to the m*(v^2/r) above.
Of course, as I recall (my physics is rusty now), mass also cancels out when it is calculated on a banked turn ... either with or without friction.