To find the acceleration of the car, we can use the formula:
acceleration (a) = (final velocity - initial velocity) / time
In this case, the initial velocity of the car is zero because it starts from rest, the final velocity is 20 m/s, and the time taken is 8 seconds. Plugging these values into the formula, we get:
acceleration (a) = (20 m/s - 0 m/s) / 8 s = 20 m/s / 8 s = 2.5 m/s²
Therefore, the acceleration of the car is 2.5 meters per second squared (m/s²).