Banked curve with radius 70 m: is friction needed at 90 km/h?

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Homework Statement



A 1300 kg car rounds a curve of radius 70 m banked at an angle of 12°. If the car is traveling at 90 km/h, will a friction force be required?

Homework Equations


i need help with work


The Attempt at a Solution

 

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start by drawing a free body diagram of the car on the bank, including the force of friction.

[Edit]- Keep in mind that a=v^2/r which will come in handy for this problem. Also remember that your velocity is in km/h