A car traveling at 30 mph skids to a stop in 60 meters. If an identical car traveling at 60 mph skids to a stop under the same conditions, what distance would it travel?
A) 340 m
B) 310 m
C) 260 m
D) 240 m
E) 190 m

Question

Quizplus · Accepted Answer

The distance traveled during a skid is proportional to the square of the speed. If the speed doubles from 30 mph to 60 mph, the skidding distance becomes four times longer (since 60^2 / 30^2 = 4). Therefore, if the car skids 60 meters at 30 mph, it would skid 4 * 60 = 240 meters at 60 mph.

A Car Traveling at 30 Mph Skids to a Stop