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
Correct Answer: D. 5cm
Explanation
Taking moment about P,
2 x d = 0.5 x (50 - 30)
2x = 10
x = 5 cm
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