Physics
posted by Anonymous
If you are traveling 25 m/s A) What acceleration is necessary to stop you in 40 meters? B) What force would stop you if you are driving a 2000 kg car? C) What is the coefficient of friction between your tires and the road?

Henry
A. V^2 = Vo^2 + 2a*d.
0 = 25^2 + 2a*40
a = ?(It will be negative).
B. F = M*a(F will be negative).
C. Fn = M*g = 2000 * 9.8 = 19,600 N. = Normal force.
Fk = u*Fn = 19,600u = Force of kinetic friction.
F19,600u = M*a.
F = Value calculated in part B.
a = Value calculated in part A.
u = ?
Respond to this Question
Similar Questions

physics
The coefficient of sliding friction between rubber tires and wet pavement is 0.50. The brakes are applied to a 750 kg car traveling 30 m per second, and the car skids to a stop. What is the magnitude and direction of the force of friction … 
Physics
A 1340 kg car going 21 m/s has to stop suddenly. The driver locks the brakes, and the car skids to a halt in a distance of 67 m . What was the car's acceleration while stopping? 
physics
A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the carâ€™s initial momentum? 
physics
A car is traveling at 60.6 mph on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.056, what is the minimum distance in which the car will stop? 
Physics
A car is traveling at 66.9 mi/h on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.13, what is the minimum distance in which the car will stop? 
physics
You are driving a car 35mi/h down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 28.5m meters. (Assume … 
Physics
A 1300kg car going 20m/s has to stop suddenly. The driver locks the brakes, and the car skids to a halt in a distance of 64m . What was the car's acceleration while stopping? 
physics
A car (mass = 750 kg) is initially moving with velocity 30 m/s. The driver slowly presses on the brakes and bring the car to a stop, traveling 50 m in the process. Calculate the force of friction between the car and the ground that … 
physics
A car is traveling at 60.6 mph on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.056, what is the minimum distance in which the car will stop? 
physics
A car has a mass of 1200 kg and is traveling perfectly horizontally on a road at 20 m/s. The car then applies the brakes and skids to a stop. If the coefficient of friction between the tires and road is .70, how much distance was required …