This topic is in the 'Forces and Equilibrium' section. In this section you'll learn some basics about forces, which are pushes or pulls. When you push or pull an object, you exert force on it. You'll also learn about equilibrium, which is a state of balance. So force equilibrium is what we have when the pushes and pulls on an object are balanced. Force equilibrium is actually pretty common! If you're reading this while sitting at rest or while moving at a constant rate, then you're at equilibrium as we speak, and that means that the force of gravity pulling you down is balanced by the force of the chair pushing you up!