How long does it take to stop when traveling at 45 mph weighing in at 6000 lbs?

Question

Trying to figure stopping time at an intersection and whether it is possible safely if given a 4.5 second window to do so before the light turns red.

Answer 1

The stopping distance depends on the size and type of brakes and the coefficient of friction between the tires and the road among other things.

here's a link to go to for the formula to make your calculation that makes assumptions for the brakes and Coefficient of Friction:

http://hyperphysics.phy-astr.gsu.edu/hbase/crstp.html

Hope that helps.

Answer 2

Dry or wet road surface? Hot day or cold day?