How can you calculate the weight of this ruler?
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Let x be the weight of the metre rule
( 2.4 N = 2.4*10 = 24 Kg)
From principle of moments,
Sum of clockwise moments = sum of anticlockwise moments
24*(20-5) = (100-20) * x
24*15= 80 *x
X = 4.5 Kg
Weight of the metre rule is 4.5 kg
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