A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the 30cm-mark. where will a force of 2N be placed from the pivot to balance the meter rule?
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Correct Answer: Option B
Explanation:
Taking moment about P,
2 x (30 - x) = 0.5 x (50 - 30)
60 - 2x = 10
2x = 50
x = 25 cm
Taking moment about P,
2 x (30 - x) = 0.5 x (50 - 30)
60 - 2x = 10
2x = 50
x = 25 cm