Piston motion equations are like a math problem to help you figure out how far a piston (a round, metal part that moves up and down) is moving. Piston motion equations involve a lot of math and include things like the force pushing the piston, how much the piston is compressing, and how much the piston is expanding. To solve these equations, you'll need to know how long the piston is, how fast it's moving, and what kind of force is pushing it. With these equations, you can figure out where the piston will be positioned in the future and how it will behave over time.