d = kr^2
90 = 1600k
k = 9/160
d(60) = 9/160 * 3600 = 202.5
The stooping distance d of a car after the brakes are appied varies directly as the square root of the speed r. If a car traveling 40mph can stop in 90 ft., how many feet will it take the same car to stop when it is traveling 60 mph.
1 answer
2 answers