Question

Driving at 75 m/s, you hit the brakes on your new car, accelerating at

a rate of -20 m/s2. How much time will it take the car to come to
rest?

Answer 1

Step-by-step explanation:

initial velocity, u = 75m/s

acceleration, a = -20m/s2

final velocity, v = 0m/s (rest)

Using the formula,

v = u + at

0 = 75 + (-20)t

t = 3.75 seconds