Final answer:
The acceleration of the Indy-500 car is 32 m/s^2.
Step-by-step explanation:
The average acceleration can be calculated using the formula:
acceleration = (final velocity - initial velocity) / time
Given that the initial velocity is 4.0 m/s, the final velocity is 36 m/s, and the time is 4.0 seconds, we can substitute these values into the formula:
acceleration = (36 m/s - 4.0 m/s) / 4.0 s = 32 m/s2
Therefore, the acceleration of the Indy-500 car is 32 m/s2 (option a).