Question

A uniform metre rule balances horizontally on a knife edge at 58 cm mark when a weight of 20 gf suspended at one end. What is the weight of the metre rule?

(a) 100 gf

(b) 105 gf

(c) 580 gf

(d) 57.5 gf ​

Answer 1

Answer:

Anticlockwise moment=clockwise moment

W x (58-50)=20gf x (100-58)

W x 8=20gf x 42

W = 20gfx42/8 = 105 gf

     

Explanation:

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