Fig 3.12, shows a uniform metre scale of weight W supported on a fulcrum at the 60 cm mark by applying the effort E at the 90 cm mark.
(a) state with reason whether the weight W of the scale is greater than, less than or equal to the effort E.
(b) Find the mechanical advantage in an ideal case.
Reason: The weight W of a uniform metre scale acts at 50 cm mark. Since distance of weight of scale from fulcrum F is less then that of the effort E., so the weight W of scale is greater than the effort E.
