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Friction and Circular Motion Watch

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    shouldn't it be:
    v=( meu*R*g)^(1/2)
    so then when rearranged,
    meu= v^2/Rg
    but that isn't the answer.
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    μ is mu.

    F = μR

    F = (mv^2)/r = μR --> μ = (mv^2)/(rR)

    R = mg, so μ = (mv^2)/(rmg) = (v^2)/(rg) = answer (1).

    Edit: I used r as radius and R as the reaction force. We need more letters.
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    (Original post by ombtom)
    μ is mu.

    F = μR

    F = (mv^2)/r = μR --> μ = (mv^2)/(rR)

    R = mg, so μ = (mv^2)/(rmg) = (v^2)/(rg) = answer (1).

    Edit: I used r as radius and R as the reaction force. We need more letters.
    Oh, okay thanks. Then the book's answer is probably wrong.
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    (Original post by 123PC)
    Oh, okay thanks. Then the book's answer is probably wrong.
    What does the book say? I do make a lot of mistakes. :ashamed2:
 
 
 
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