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3. A physical balance has its arms of length 60 cm and40 cm. What weight kept on the pan of longer armwill balance an object of weight 100 gf kept on theAns. 66-67 gfother pan?

Answer»

For the pan to come in equilibrium... The anticlockwise moment of one force must be equal to clockwise moment of other force.

Anticlockwise moment= F*length= x*60 Clockwise moment=F*len= 100*40=4000

At equilibrium,

Anticlockwise moment=Clockwise moment60x = 4000x= 66.667 gf



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