You are shown a photo of a car driven on a vertical inside wall of a huge cylinder with a radius of 50 m. The coefficient of static friction between the car tires and the cylinder is ms = 0.8. The minimum speed in (m/s), at which the car can be driven like that is 5x. Find x.

Question

G1 Physics · Accepted Answer

For a car on the vertical wall, N=mv²/R and limiting friction µN=mg. Thus v(min)=√(gR/µ)=√(10×50/0.8)=25 m/s=5x, giving x=5.