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The diagram below shows a lever in use.

The diagram shows a lever in use. To which class of lever does it belong? If AB =1 m, AF= 0.4 m, find its mechanical advantage. Calculate the value of E. Machines, Concise Physics Class 10 Solutions.

(a) To which class of lever does it belong?

(b) If AB =1 m, AF= 0.4 m, find its mechanical advantage.

(c) Calculate the value of E.

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Answer

(a) The diagram represents a Class I lever.

(b) Given,

AB = 1m

AF = Load arm =0.4 m

BF = Effort arm = 0.6 m

Mechanical advantage M.A.=Effort armLoad armM.A.=0.60.4M.A.=1.5\text{Mechanical advantage M.A.} = \dfrac{\text{Effort arm}}{\text{Load arm}} \\[0.5em] M.A. = \dfrac{0.6}{0.4} \\[0.5em] \Rightarrow M.A. = 1.5 \\[0.5em]

(c) We know that,

Effort=LoadM.A\text{Effort} = \dfrac{Load}{M.A} \\[0.5em]

Given,

Load = 15 kgf

Substituting the values in the formula we get,

Effort=151.5Effort=10kgf\text{Effort} = \dfrac{15}{1.5} \\[0.5em] \Rightarrow \text{Effort} = \text{10kgf} \\[0.5em]

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