Vavg DxDt Xf X0tf t0 This is the change in position divided by the time of travel. Note the initial velocity and constant acceleration. Average velocity formula - weighted average of velocities.
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We need to divide the total displacement by the total time elapsed. Draw secant line joining these points. To find average velocity from the definition of velocity the total displacement is divided by the total time taken for that movement. Average velocity formula - weighted average of velocities.