Question

consider the car driving around a circular track. once started, the driver maintains a speed of 45 m/h. compare the drivers velocity with his acceleration in this case
a the car is accelerating because it is changing direction but the velocity is constant
b the car is traveling at a constant rate of speed so it is not accelerating and the velocity does not change
c acceleration is the change in velocity so the car is experiencing a change in velocity and it is accelerating
d the car is traveling at a constant rate of speed so it is not accelerating but the velocity changes because the direction the car travels is constantly changing

Explanation:

Velocity is a vector quantity that includes both speed and direction. The car has a constant speed of 45 m/h but its direction is constantly changing as it moves in a circular path. Acceleration is the rate of change of velocity. Since the direction (part of velocity) is changing, the velocity is changing and thus the car is accelerating.

Answer:

C. Acceleration is the change in velocity so the car is experiencing a change in velocity and it is accelerating