Question

which formula is used to calculate average velocity? v_avg = (x_f - x_i)/(t_f - t_i) v_avg = (t_f - t_i)/(x_f - x_i) v_avg = d×t v_avg = t/d

Explanation:

Average velocity is defined as the displacement ($x_f - x_i$, change in position) divided by the time - interval ($t_f - t_i$, change in time). The correct formula is $V_{avg}=\frac{x_f - x_i}{t_f - t_i}$.

Answer:

$V_{avg}=\frac{x_f - x_i}{t_f - t_i}$ (the first option)