How does mass effect the flight of a paper airplane?

The mass of a paper airplane affects its flight by influencing its stability, lift, and drag. A heavier airplane may have more momentum, allowing it to glide farther, but it also requires more lift to stay aloft, which can lead to a shorter flight if not properly designed. Conversely, a lighter airplane may be more susceptible to air currents and may not travel as far unless it has an optimal design for lift. Ultimately, the ideal mass depends on the balance between weight and aerodynamic shape.