As a general rule, when two rescue hauling systems are joined at the input of the first, the resulting TMA is obtained by?

When two rescue hauling systems are joined at the input of the first, the resulting tension or mechanical advantage is obtained by multiplying the mechanical advantages of both systems. This principle stems from the mechanics of systems in series, where the load experienced by the first system is essentially shared by the second system, and their benefits combine geometrically.

In rescue operations, understanding how multiple systems interact is vital for ensuring safe and effective lifting or lowering of loads. By multiplying the mechanical advantages, rescuers ensure that they consider the interaction between multiple hauling systems, which can significantly enhance their lifting capacity beyond what a single system could achieve. This is crucial for assessing how much load can be safely managed during a rescue operation.