When two objects with different masses ($m₁$ and $m₂$) collide, how do the magnitudes of the forces they exert on each other during the collision compare?

Two packages of masses $m_1$ and $m_2$ are moving toward each other with speeds $v_1$ and $v_2$ respectively on a frictionless surface. If the packages stick together after the collision, what is their common speed immediately after the collision?

In the context of types of collisions, what happens to the total $KE$ of the system during a perfectly elastic collision between two objects?

In an elastic collision between two objects, what physical quantities are conserved in this collision?

In an inelastic collision, which of the following statements is true?

When two sleds collide, what happens to the total $kinetic energy$ of the system if the collision is perfectly inelastic?

During a brief collision between two objects, which of the following quantities is always conserved, regardless of whether the collision is elastic or inelastic?

Regardless of the type of collision, which physical quantity is always conserved in an isolated system?