I came across the problem-
A turn of radius 20m is banked for the vehicles going at a speed 36km/hr. If the coefficient of static friction between road and the is 0.4, what are the possible speeds of a vehicle so that it neither slips down or skids up?
While solving it, I come across resolving forces along the road as frictional force, sine of force due to gravity and also Sine of Normal Reaction force which just complicates the solution
What is the way to solve this question as the solution I have just says ignore normal reaction and then solve the question, and it works. How? I mean if Normal reaction is giving the force, why is it not in the Free Body Diagram?