physics

A coin placed on a rotating turn table just slips if it is at a distance of 40cm from the centre if the angular velocity of the turn table is doubled,it will just slip at a distance of

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  1. a=ω²R,
    F(fr)=μN=μmg,

    ma =F(fr) =>

    mω²R₁= μmg
    m(2ω)²R₂=μmg
    ω²R₁=4ω²R₂
    R₂=R₁/4

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