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# Centripetal force help watch

1. A bend in a racing track has a radius of 350m and it is banked at 32 degrees to the horizontal. At what speed must a car be driven for the for the transverse (down-slope) frictional forces on the tyres to become zero?<br><br>can someone point me in the right direction in this question because I have no idea where to start...
2. (Original post by Zevo)
A bend in a racing track has a radius of 350m and it is banked at 32 degrees to the horizontal. At what speed must a car be driven for the for the transverse (down-slope) frictional forces on the tyres to become zero?<br><br>can someone point me in the right direction in this question because I have no idea where to start...
You would normally do the theory for this in class. It involves using the components of forces along the slope and results in a formula which you use for this question. The formula gives the angle of banking of the track θ in an equation as tan θ and includes the radius (r) of the curve, g, and the speed of the car. Then it's just rearranging the formula for v.

Have you done this theory? Have you seen the formula?
If yes you can now do the question.
If no you need to do this theory first.
3. (Original post by Stonebridge)
You would normally do the theory for this in class. It involves using the components of forces along the slope and results in a formula which you use for this question. The formula gives the angle of banking of the track θ in an equation as tan θ and includes the radius (r) of the curve, g, and the speed of the car. Then it's just rearranging the formula for v.

Have you done this theory? Have you seen the formula?
If yes you can now do the question.
If no you need to do this theory first.
I have not seen this formula but since I got questions on it I had to learn it. We are learning about gravity in class now.

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