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**1. Homework Statement**

As we know, if a car accelerate on curve at certain speed, it will tilt outside the circle track. So i sketch this 2 picture to show how (for me) it works.

http://img193.imageshack.us/img193/2323/66057246.jpg [Broken]

http://img194.imageshack.us/img194/9272/96495741.jpg [Broken]

I just wondering, how can the car tilt or flip outside the circle track if the side force (centripetal force) is pointing inside the circle?

**2. Homework Equations**

My suggestion:

Total Moment about tyre (2); ∑M2=0

**3. The Attempt at a Solution**

So, Fs*h + G*b/2 - FN1*b = 0

I assume that FN1=0 since the car is about to tilt about tyre (2). So here come the problem.

Fs = - G*b / 2h.

The minus sign shows that the side force, Fs, should point outside the circle.

Any comments?

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