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Physics

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A 5.0 g coin is placed 15 cm from the center of the turntable. THe coin has static and kinetic coefficients of friction with the turntable surface of us=.8 and uk=.5. THe turntable very slowly speeds up to 60 rpm. Does the coin slide off?

  • Physics - ,

    Centrifugal force, Fc
    = mrω²
    r=0.15m
    m=0.005kg
    ω=60 rpm
    =60*2*π/60s
    = 2π s-1

    Static frictional force, Fs
    = mμs

    If Fc>Fs, the coin will slide off, since μs > μk.

  • Physics - ,

    answer is actually no

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