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Physics(Please help)

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A fan blade is rotating with a constant angular acceleration of +12.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?

I do not know how to start this.

  • Physics(Please help) -

    ε= 12.4 rad/s²,
    a(tang) =9.8 m/s²
    a(tang) = ε•R.

    R = a(tang)/ ε = 9.8/12.4 = 0.79 m

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