Answer to Question #337080 in Physics for Justine

Question

How long will it take to put a 4500 kg truck to rest from a velocity of 20.0 m/s if the force applied by the brakes is 5000N?

Answer 1

$$F=ma=m\frac{\Delta v}{\Delta t}$$

$$\Delta t=4500*\frac{20.0}{5000}=18\:\rm s$$