In which situation does the reactive force between two colliding objects cause physical change?

Answer 1

The reactive force between two colliding objects causes physical change in situations where the force is strong enough to cause a deformation or movement in one or both of the objects. This could include situations where objects collide with enough force to break or bend them, or where one object is propelled away from the other due to the force of the collision. In general, the greater the force of the collision, the greater the physical change that will occur as a result of the reactive force between the objects.