A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the brakes were applied. In approximately what distance would the car have stopped had it been going 105.4
Mph?
A) 279 m
B) 158 m
C) 29 m
D) 51 m
E) 90 m

Question

Quizplus · Accepted Answer

The stopping distance is proportional to the square of the speed. If the speed triples (from 34.0 mph to approximately 105.4 mph), the stopping distance increases by a factor of 3^2 = 9. Therefore, the new stopping distance is 29 meters * 9 = 261 meters, which is closest to option A, 279 meters.

A Certain Car Traveling at 34