Specialist part · #3634 · 3 pts
In what way does doubling of the speed of a passenger car influence the braking distance?
aIt doubles the braking distance.
bIt quadruples the braking distance.
cIt has no influence on the braking distance.
Why?
Under the same conditions, braking distance increases in proportion to the square of speed, so doubling the speed makes the braking distance four times as long. A and C ignore this relationship. This concerns braking alone and excludes the distance travelled during the driver's reaction time.