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A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the...

Physics
JAMB 1998

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?

  • A. 95cm
  • B. 25cm
  • C. 20cm
  • D. 5cm
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Correct Answer: Option D
Explanation

Taking moment about P,

2 x d = 0.5 x (50 - 30)

2x = 10

x = 5 cm


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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