Problema Solution
The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 50 mph can stop in 100 ft, how many feet will it take the same car to stop when it is travelling 75 mph?
Answer provided by our tutors
let 'x' represent the distance required to stop at 75 mph
50/100 = 75/x
x = (75*100)/50 = 150
travelling at 75mph, the car will require 150 feet to stop