A uniform metre scale is balanced at 40 cm mark, when weights of 25 gf and 10 gf are suspended at 5 cm and 75 cm mark respectively. Calculate weight of metre scale
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Answer:
52.5 gf
Explanation:
Moment in clockwise direction,
=W x 10 cm + 5 gf x 35 cm
=10 W cm + 175 gf cm.
Moment in anti-clockwise direction,
= 20 gf x 35 cm = 700 gf cm.
By the law of moments.
Moments in clockwise direction
= Moments in anti-clockwise direction.
=> 10 W cm + 175 gf cm = 700 gf cm
=> 10 W cm = (700-175) gf cm
=> 10 W cm = 525 gf cm
=> W = 52.5 gf.
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