acceleration

[espo]

the question what is the average acceleration of a car that goes
from rest to 69 km h in 9 seconds; don't i use the formula
a = vf-vi over t vf - 59 / 9 what is the correct final answer 16.5 km

[lavalamp]

You shouldn't cross post: http://www.physicsforums.com/showthread.php?s=&postid=87717#post87717