A modern race car is designed so that the passing air pushes down on it, allowing the car to travel much faster through
Posted: Sun Jul 10, 2022 12:11 pm
A modern race car is designed so that the passing air pushesdown on it, allowing the car to travel much faster through a flatturn in a Grand Prix without friction failing. This downward pushis called negative lift (FL). Consider a Grand Prix race car ofmass m = 600 kg as it travels on a flat track in a circular arc ofradius R = 100 m. Because of the shape of the car and the wings onit, the passing air exerts a negative lift downward on the car. Thecoefficient of static friction between the tires and the track is0.75. (Assume that the forces on the four tires are identical.)
A) If the car is on the verge of sliding out of the turn whenits speed is 28.6 m/s, what is the magnitude of the negative liftacting downward on the car?
B) The magnitude FL of the negative lift on a car depends on thesquare of the car’s speed v2, just as the drag force does. Thus,the negative lift on the car here is greater when the car travelsfaster, as it does on a straight section of track. What is themagnitude of the negative lift for a speed of 90 m/s?
C) Whether this racing car can do an upside-down racing on along ceiling at the speed of 90 m/s?
A) If the car is on the verge of sliding out of the turn whenits speed is 28.6 m/s, what is the magnitude of the negative liftacting downward on the car?
B) The magnitude FL of the negative lift on a car depends on thesquare of the car’s speed v2, just as the drag force does. Thus,the negative lift on the car here is greater when the car travelsfaster, as it does on a straight section of track. What is themagnitude of the negative lift for a speed of 90 m/s?
C) Whether this racing car can do an upside-down racing on along ceiling at the speed of 90 m/s?