Determine the force that must be applied to end of the class 1 lever shown below to lift the 500 lb load.
100 lb
2500 lb
500 lb
5 lb
The diagram shows the use of a lever. If FA = 10 cm, AB = 500 cm, calculate the minimum effort required to lift the load.
In fig below shows the use of a lever.
(a) State the principle of moments as applied to the above lever.
(b) To which class of lever does it belong? Give an example of this class of lever.
(c) If FA = 10 cm , AB= 490 cm, calculate : (i) the mechanical advantage, and (ii) the minimum effort required to lift the load (= 50 N).
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).