The formula for the braking distance of a car is:
d =(0.03361v^2)/μ
where:
• d is the braking distance (in feet)
•v is the initial velocity of the car (in miles per hour)
•μ is the coefficient of friction between the tires and the roadway
At the scene of an accident, the driver tells a police officer he had been driving at 50 miles per hour when he slammed on his brakes and skidded off the road.
If the road is covered in snow with a friction coefficient of 0.25, how long should the skid marks be if the driver was really going 50 miles per hour?
(I FOUND THE ANSWER TO D ALREADY.)
d=336.1 feet
The officer measures the skid marks and finds they are 449 feet long, which shows the driver was going faster than 50 miles per hour. Use d = 449 to
determine the actual speed of the car.
v= ___ miles per hour (Round to 1 decimal place.)
