- #1

NYCHE89

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## Homework Statement

How much pressure must be exerted by the braking system of a car weighing 3000 lb, if you want to stop it from 40 mph to 0 in 1.5 seconds? Assume the total braking surface of the four wheels is 96 in^2. How much force must be exerted by your foot on the brake pedal in the absence of a vacuum assist, if the brake cylinder diameter is 3/4 inch?

## Homework Equations

Am I supposed to know something about cars to answer this? I don't understand how to even start this problem.