Posted by sammy on Monday, July 1, 2013 at 4:27pm.
A 950kg race car can drive around an unbanked turn at a maximum speed of 46 m/s without slipping. The turn has a radius of 120 m. Air flowing over the car's wing exerts a downwardpointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of static friction between the track and the car's tires? (b) What would be the maximum speed if no downforce acted on the car?

physics  Sara, Sunday, March 8, 2015 at 2:42pm
a) μ = Fc/FN (i)
FN =(950x9.8)+12000= 21310
Fc =(950)(46)^2/120= 16751
Putting values in (i) μ=0.7860 (no unit)
b) v= sqrt(rμg)= sqrt[(120)(0.7860)(9.8)]
v= 30.40 m/s^2