1.

Uniform metre scale is pivoted at 29 cm mark. A weight of 20 gf is suspended at 0 mark of the scale to balance it.The weight of the metre scale is : ​

Answer»

Let the WEIGHT of the half METRE rule be x gf and it acts at the 25 cm mark (centre of gravity).Now, Acticlockwise moment = x×4Clockwise moment = 20×21In equilibrium, Anticlockwise moment = Clockwise moment4x=20×21x=105 gf.Thus, the weight of the metre rule is 105gf.We KNOW, ONE gf is the force acting on the BODY of mass 1 grams, thus mass of the body is 105grams.Explanation:plz follow



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