Question

Cody’s car accelerates from 0m/s to 45 m/s northward in 15 seconds. What is the acceleration of the car?

Answer 1

By definition, the acceleration is given as follows:

$$a = \dfrac{v_f-v_i}{t}$$

where $v_i = 0m/s, v_f = 45m/s$ is the initial and final speeds respectively, $t = 15s$. Thus, obtain:

$$a = \dfrac{45m/s-0m/s}{15s} = 3m/s^2$$

Answer. 3 m/s^2.