Problema Solution
the stopping distance d of a car after the brakes are applied varies directly as the square of speed r. if a car traveling 40mph can stop in 90ft, how many feet will it take the same car to stop when it travels 60mph?
Answer provided by our tutors
set up a proportion:
40/90 = 60/x
cross multiply to solve
40x = 5400
x = 135
therefore it will take 135 feet to stop