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Question

A fire tongs has its arms 20 cm long. It is used to lift a coal of weight 1.5 kgf by applying an effort at a distance of 15 cm from the fulcrum. Find : (i) the mechanical advantage of the fire tongs , and (ii) the effort needed.


Solution

Effort arm = 15 cm

Load arm =20 cm

(i) Mechanical advantage
M A equals 15 over 20 equals 0.75
(ii)

Effort = LoadMA=1.50.75=2 kgf


Physics
Concise Physics
Standard X

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