Final answer:
Suspension bridges use cables, chains, or ropes to span the length of space between two supports while maintaining stability.
Step-by-step explanation:
Suspension bridges use cables, chains, or ropes from two supports to span the length of space. These supports are usually towers or piers. The weight of the bridge is evenly distributed along the length of the cables, creating the characteristic curve of the bridge. Physics principles, such as tension, compression, and equilibrium, are crucial in designing and maintaining the stability of suspension bridges.