I'm trying to solve this problem:
If the speed of a car is increased by 50%, by what factor will its minimum braking distance be increased, assuming all else is the same? Ignore the driver's reaction time.

I tried using the equation
Net Work=force*distance*cosine(theta) and the work-energy principle, but I got the wrong answer. Help?

Question

I'm trying to solve this problem:
If the speed of a car is increased by 50%, by what factor will its minimum braking distance be increased, assuming all else is the same? Ignore the driver's reaction time.

I tried using the equation
Net Work=force*distance*cosine(theta)   and the work-energy principle, but I got the wrong answer. Help?

anonymous · Answer

Nevermind, I got it :)   
(it's 2.25 by the way)