Jessica Jacob is driving down the road at 35 m/s. She sees a cop and slows to 20 m/s in only 2 seconds. What was her acceleration?

Answer: Acceleration = - 7.5 m/s^2

Explanation:

Acceleration (a) is the rate of change in velocity. I. e

Acceleration = (V - U) / t

U = 35 m/s

V = 20 m/a

t = 2 s

Acceleration = (20 - 35) / 2

Acceleration = - 15/2

Acceleration = - 7.5 m/s^2

In this case, the car is decelerating at 7.5 m/s^2