Question on: JAMB Physics - 2016
A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?
A
30cm
B
10cm
C
20cm
D
25m
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Correct Option: C
Clockwise moment = Anti-clockwise moment
10 x 30 = 15 x X
X = 20cm
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