A uniform metre scale is balanced at 60 cm mark. If a weight of 20 gf is suspended at 10 cm mark and another weight of 80 gf is suspended at other end. Calculate the weight of the metre scale.
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Step-by-step explanation:
Let w be the mass of metre scale acting a mid point 50cm Clock wise moment = 40 × (80 – 60) = 40 × 20 = 800gfcm
(i) Anticlockwise moments = 5 × (60 – 10) + w × (60 – 50) (250 + 10 w)gfcm
(ii) Anticlockwise moment = clock wise moment 250+ 10w = 800 10w = 800 - 250 = 550w = 550/10 = 55gf.
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