Question: what is the normal acceleration of a car?
Answer: "Acceleration (0-60 mph): 7.0 sec." ... The acceleration of cars in the United States is stated as a "zero to sixty" time, where vi is zero and vf is 60 miles per hour or 27 meters per second. The average rate of acceleration of all the ordinary cars I found was between 3 and 4 m/s2.