In fig shows a lemon crusher.
(a) In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E.
(b) Name the class of lever.
State the class of levers and the relative positions of load (L), effort (E) and fulcrum (F) in (a) a bottle opener, and (b) sugar tongs.
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.
The diagram below shows a rod lifting a stone.
(a) Mark position of fulcrum F and draw arrows to show the directions of load L and effort E . (b) What class of lever is the rod ? (c) Give one more example of the same class of lever stated in part (b).