## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

$a = 83.3~m/s^2$
We first convert the speed to units of m/s; $v = (150~km/h)(\frac{1000~m}{1~km})(\frac{1~h}{3600~s}) = 41.67~m/s$ We can then find the acceleration of the air; $a = \frac{v-v_0}{t} = \frac{41.67~m/s-0}{0.50~s}$ $a = 83.3~m/s^2$