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The diagram above illustrates a uniform metre rule which is balanced on a pivot by...

Physics
WAEC 2014
The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M
  • A. 500.0g
  • B. 400.0g
  • C. 44.4g
  • D. 25.0g
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Correct Answer: Option D
Explanation
clockwise moment = Anti-clock wise moment

= M x 40 = 100 x 10

M = \(\frac{1000}{40}\)

= 25g
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