Question

If a curve with a radius of 88 m is properly banked for a car traveling 68 km/h , what must be the coefficient of static friction for a car not to skid when traveling at 91 km/h

?

Express your answer using two significant figures.

Answer 1

As the curve of radius 88 m is properly banked for a speed

So in this case, as this is the optimal speed, so

where theta is the banking angle for optimal speed without any wear and tear,

Now speed in case two now using the same angle and considering the role of friction