The lever for which the mechanical advantage is less than 1 has the :
(a) fulcrum at the midpoint between the load and effort.
(b) load between the effort and fulcrum.
(c) the effort between the fulcrum and load.
(d) load and effort acting at the same point.
An effort of 50kgf is applied at the end of a lever of the second order, which supports a load of 750kgf, such that the load is at a distance of 0.1m from the hinge. find the length of the lever.