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Q.

Radius of one arm of hydraulic lift is four times of radius of other arm. What force should be applied on the narrow arm to lift 100kg ?

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a

8.3N

b

26.5N

c

6.25N

d

62.5N

answer is B.

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Detailed Solution

detailed_solution_thumbnail

F1A1=F2A2

⇒F1=F2A2A1=100(10)π(4r)2πr2=62.5N

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