The diagram shows the use of a lever.
(i) State the principle of moments as applied to the above lever.(ii) Which class of lever is this? Give an example of this class of lever.(iii) If FA = 100 cm, AB = 90 cm, calculate the minimum effort required to lift the load.
(i) Sum of the clockwise moments about the fulcrum is equal to the sum of the anti-clockwise moments about the fulcrum.
(ii) Lever of class III, example: foreceps or a pair of tongs.
(iii) E × 100 = 190 × 20∴ E = 38 N.