Mechanical advantage of a lever
Mechanical advantage of a lever If we neglect friction at the fulcrum and the weight of the lever itself (both being comparatively small in most cases) the mechanical advantage in any particular case may be obtained by writing down the equation of moments for the load and effort
A similar equation of moments may be obtained for any of the other lever devie shown in Fig. 8.1. The mechanical advantage in any particular case will depend, 0 course, on the position of the fulcrum in relation to the effort and load.