Acceleration = (velocity final-velocity initial)/ time where velocity final = 135 km/hr x 1 hr /3600 s x 1000m/1km = 37.5 m/s velocity initial = 35 km/hr x 1hr /3600 s x 1000 m/1 km = 9.72 m/s a) acceleration = 2.646 m/s^2 b) acceleration in g units = (2.646m/s^2)/(9.8m/s^2) = 0.27 units