find the stopping distance if a van is traveling at 48mph

Question

the stopping distance of a van varies directly with the square of the speed. a van traveling at 40mph can stop in 40ft. I need to solve for d

Answer 1

d = ks²

 

40 = k(40)²

1/40 = k

 

d = (1/40)(48)²

d = (1/40)(2304)

d = 57.6