The diagram shows the use of a lever.

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asked Dec 7, 2018 in Class X Science by aditya23 Premium (930 points)

The diagram shows the use of a lever.
icse-solutions-class-10-physics-20

(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.

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1 Answer

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answered Dec 7, 2018 by muskan15 (-1,583 points)

(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.

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