By R Carter
Newton's third law of motion states that for every action (force) in nature, there's an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal but opposite force on object A, or Fa = -Fb. Notice that force is exerted on both objects and in both directions even if one is resting and not in motion. This force is often expressed as work, work is defined as the product of force, so regardless of whether we’re talking about objects moving through space or something more abstract like a healthcare system, the principle remains because the universe, at the level in which we operate, is based on cause and effect. And if we’ve modeled our system completely, the net effect for a force applied to another system is always zero, they cancel each other out.
