Home/Basic Physics/2D and 3D Motion/Relative velocity3. 2D and 3D MotionRelative velocityIn 3. 2D and 3D MotionFormulaCopy LaTeXv⃗P/A=v⃗P/B+v⃗B/A\vec v_{P/A}=\vec v_{P/B}+\vec v_{B/A}vP/A=vP/B+vB/ATagskinematicsphysicsphysics formulamotion 2D 3DprojectilesDetailRelative velocity is obtained by composing velocities with respect to intermediate frames.Explore the ideaExplore the ideaFound an error? Contact us.Related formulasRelatedAverage vector velocityv⃗med=Δr⃗Δt\vec v_{\text{med}}=\frac{\Delta\vec r}{\Delta t}vmed=ΔtΔrOpen formulaOpen in sectionRelatedVector additionR⃗=∑iA⃗i\vec R=\sum_i\vec A_iR=i∑AiOpen formulaOpen in section