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If an object just begins to slide on a surface inclined at 30o to the horizontal,the ...

If an object just begins to slide on a surface inclined at 30o to the horizontal,the coefficient of friction is
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  • A √3
  • B √3/2
  • C 1/√2
  • D 1/√3
Correct Answer: Option D
Explanation:
A body sliding down a plane inclined at 30o to the horizontal, has coefficient of friction
= tan 30o = 1/√3

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