Physics equations/Kinematics/More problems

Example 1: A particle starting at the origin has moved 27 m in 9 s. Find $\overline{v}$.

$\overline{v}=\frac{x_f-x_i}{t_f-t_i}=\frac{27\mathrm{m}-0\mathrm{m}}{9\mathrm{s}-0\mathrm{s}}=3\mathrm{m}/\mathrm{s}$

Example 2: A particle starting 23 m from the origin has moved to 43 m in 5 s. Find $\overline{v}$.

$\overline{v}=\frac{x_f-x_i}{t_f-t_i}=\frac{43\mathrm{m}-23\mathrm{m}}{5\mathrm{s}-0\mathrm{s}}=\frac{20\mathrm{m}}{5\mathrm{s}}=4\mathrm{m}/\mathrm{s}$