Why do cars seem to decelerate faster when at a higher speed than at a lower speed?

Question

When exiting off of an interstate, why does the car seem to go from 75mph to 50mph faster than 25mph to 0mph? The road composition, grade of the road, or the tires on the vehicle never changed, yet the car seems to maintain its velocity at the slower speeds.

In: Physics

Answer 1

Air resistance is helping you far more in the 75-50 example. Air resistance is a function of speed^2, so going twice as fast gives you 4x the air resistance, which always helps you slow down.