ABSTRACT
This chapter discusses the equilibrium equations can be used for several other types of structures such as arches, cables and frictionless pulleys. Arches with both supports located at the same elevation are discussed. Arches with supports located at different elevations are discussed in higher-level courses such as structural analysis. The simplest theory of operation for a frictionless pulley system assumes that the pulleys and lines are weightless, and that there is no energy loss due to friction. A cable is a flexible member that can only support tension. Cables can be made of practically any material, such as wool or any other natural or artificial fibers, but in most engineering applications cables are made of steel. The simplest theory of operation for a frictionless pulley system assumes that the pulleys and lines are weightless, and that there is no energy loss due to friction.
