Physics
A uniform half metre rule balances horizontally on a knife edge at 29 cm mark when a weight of 20 gf is suspended from one end.
(i) Draw a diagram of the arrangement.
(ii) What is the weight of the half metre rule?
Force
ICSE 2017
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Answer
(i) Diagram of the arrangement is shown below:
(ii) If W gf is the weight of half meter rule, by the principle of moments,
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