A wheel rotates around a stationary axis so that the rotation angle \( \phi \) varies with time ...

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A wheel rotates around a stationary axis so that the rotation angle \( \phi \) varies with time as \( \phi=a t^{2} \), where \( a=0.20 \mathrm{rad} \mathrm{s}^{-2} \). Find the total acceleration \( w \) of the point \( A \) at the rim at the moment \( t=2.5 \mathrm{~s} \) if the linear velocity of the point \( A \) at this moment \( v=0.65 \mathrm{~ms}^{-1} \).
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