a car moving at 25 m/s speeds up to 47m/s. it takes 9 seconds to do this.what is the acceleration of the car?

Acceleration = (change in speed) / (time for the change)Change in speed = (47 - 25) = 22 m/sAcceleration = 22 / 9 = 2 and 4/9 m/s²(Roughly 1/4 of a 'G '.)