Home/Basic Physics/2D and 3D Motion/Average vector velocity3. 2D and 3D MotionAverage vector velocityIn 3. 2D and 3D MotionFormulaCopy LaTeXv⃗med=Δr⃗Δt\vec v_{\text{med}}=\frac{\Delta\vec r}{\Delta t}vmed=ΔtΔrTagskinematicsphysicsphysics formulamotion 2D 3DprojectilesDetailRatio of the vector displacement to the elapsed time interval.Explore the ideaExplore the ideaFound an error? Contact us.Related formulasRelatedVector displacementΔr⃗=r⃗f−r⃗i\Delta\vec r=\vec r_f-\vec r_iΔr=rf−riOpen formulaOpen in sectionRelatedInstantaneous vector velocityv⃗=dr⃗dt\vec v=\frac{d\vec r}{dt}v=dtdrOpen formulaOpen in section