Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. In the context of two colliding blocks, when one block impacts another, both blocks exert equal forces on each other. However, due to the finite time of impact, the blocks undergo deformation—compression, twisting, and bending—allowing them to move rather than stop immediately. This deformation results in additional forces acting on each block, which are part of the action-reaction pair described by Newton's laws.
PREREQUISITESStudents of physics, educators teaching motion concepts, and engineers involved in mechanics and material science will benefit from this discussion.