A rolling body of mass \( m=4 \mathrm{~kg} \), radius \( R \) and radius of gyration \( k=R / \s...

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A rolling body of mass \( m=4 \mathrm{~kg} \), radius \( R \) and radius of gyration \( k=R / \sqrt{3} \) is placed as a plank which moves with
\( \mathrm{P} \) an acceleration \( a_{0}=1 \mathrm{~ms}^{-2} \). Find the frictional force acting

W on the body if it rolls without sliding. (in N).
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