Average velocity for linear motion (2-1)

\(\textbf{Elapsed time}\) for the time interval: The object is at \(x_1\) at time \(t_1\), and \(x_2\) at time \(t_2\), so the elapsed time is \(\Delta{t }= t_2 - t_1\).

\(\textbf{Displacement}\) (change in position) of the object over a certain time interval: The object moves from \(x_1\) to \(x_2\), so \(\Delta{x} = x_2 - x_1\).

For both the displacement and the elapsed time, subtract the earlier value (\(x_1\) or \(t_1\)) from the later value (\(x_2\) or \(t_2\)).

\(\textbf{Average velocity}\) of an object in linear motion