The us national highway traffic safety administration lists the minimum braking distance for a car traveling at 40.0 mi/h to be 101 ft. if the braking force is the sam at all speeds , what is the minimum braking diatance for a car traveling at 65.0 mi/h?

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

measure their densities same density, same sub