Asked by Maryann

A meter rule is balanced horizontally on a mass of 30kg hung 20cm from one end. If the position of the knife edge is 18cm from the centre of gravity of the rule. The weight of the rule will be.
Answered by scott
unclear wording ...
Answered by bobpursley
summing moments about knife edge:
30*(30-18)-Weight*18=0
solve for Weight of rule.
W=30*12/18 kg
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