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Physics

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What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6

  • Physics -

    x: 0 =F-m•g•sinα-F(fr)
    y: 0=N-m•g•cosα,

    0 =F-m•g•sinα-F(fr)= F-m•g•sinα- μ•N=
    =F - m•g•sinα- μ•m•g•cosα.
    F = m•g(sinα- μ•cosα)=
    = 340•(sin42-0.6•cos42)=...

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