The equation s = v30fd can be used to find a car's speed s in miles
per hour given the length d in feet of a skid mark and the friction
factor f of the road. police measured a skid mark of 90 feet on a dry
concrete road. if the speed limit is 35 mph, was the car speeding?
explain. table below
road | concrete | tar
wet. | 0.4. | 0.5|
dry. | 0.8. | 1.9. |