Physics
A uniform metre rule of weight 10 gf is pivoted at its 0 mark.
(i) What moment of force depresses the rule?
(ii) How can it be made horizontal by applying a least force?
Force
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Answer
(i) Moment of force = Fr
Substituting the values of F and r we get,
In order to make the rule horizontal by applying least force distance has to be max as moment of force will remain same.
So,
Therefore, a force of 5 gf upwards at 100 cm can balance the rule.
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