A body of mass 120g placed at the 10cm mark on a uniform metre rule...

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

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Correct Answer: Option D

Explanation

m = \(\frac{25 \times 120}{15}\)

= 200g

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A body of mass 120g placed at the 10cm mark on a uniform metre rule...

Correct Answer: Option D

Explanation

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