Question

The length of skid marks a car makes when braking varies directly with the square of the speed of the car. If a car traveling 25 mph leaves skid marks 30 ft long, how long would the skid marks be if the car is traveling 40 mph??

Answer 1

x = k v^2
30 = k (625)
k = 30/625

x = (30/625)(1600)
= 76.8 ft

Answer 2

Hey Amy, you should be able to do these now.

Answer 3

yea im getting it now that one I did by myself and just needed to know if I got it right thanks for all the help :)