Assume that the stopping distance of a van varies directly with the sqaure of the speed . A van traveling 40 miles per hour can stop in 60 feet. If the van is traveling 56 miles per hour, what is its stopping distance?

Answer 1

d = ks^2
So, d/s^2 = k, a constant.

So, you want d such that

d/56^2 = 60/40^2