A body of mass 120g placed at the 10cm mark on a uniform metre rule...
PHYSICS
WAEC 2011
A body of mass 120g placed at the 10cm mark on a uniform metre rule makes the rule settle horizontally on a fulcrum places at 35cm mark. Calculate the mass of the rule
- A. 60g
- B. 80g
- C. 120g
- D. 200g
Correct Answer: D. 200g
Explanation
m = \(\frac{25 \times 120}{15}\)
= 200g
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