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A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees?

  • physical -

    0=mgsinα - F(fr)=
    =mgsinα - μN=
    =mgsinα - μmgcosα.
    μ=sinα/cosα =tanα
    α =tan⁻¹0.58 =30.11º

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