If a car starts at rest and accelerates to 40 m/s in a time of 10 s. What is the acceleration of the car?
Acceleration = v final - v initial/time
A. -4 m/s^2
B. 4 m/s
C. 4 m/s^2
D. 400 m/s^2
Acceleration = (40 m/s - 0 m/s) / 10 s
Acceleration = 40 m/s / 10 s
Acceleration = 4 m/s^2
Therefore, the correct answer is C. 4 m/s^2.