Physics equations/Kinematics/More problems

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

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

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

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

reference

↑ This and others below are from https://en.wikipedia.org/w/index.php?title=Equations_of_motion&oldid=579071246

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