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29 September, 07:20

The block accelerates down the 30 degree incline at 3m/s2. What is the coefficient of friction of these surfaces

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  1. 29 September, 07:34
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    Fnet = Fg sin 30 - Ff

    ma = mg sin 30 - mew Fg cos 30

    ma = mg sin 30 - mew mg cos 30

    a = g sin 30 - mew gcos30

    a - g sin 30 = - mew g cos 30

    mew = - (a - g sin30) / (g cos 30)

    mew = - (3m/s2 - 9.81sin30) / (9.81 cos 30)

    mew = 0.22
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