(Solved): "19-12. The double pulley consists of two wheels which are attached to one another and turn at the ...
"19-12. The double pulley consists of two wheels which are attached to one another and turn at the same rate. The pulley has a mass of \( 15 \mathrm{~kg} \) and a radius of gyration of \( k_{O}=110 \mathrm{~mm} \). If the block at \( A \) has a mass of \( 40 \mathrm{~kg} \), determine the speed of the block in \( 3 \mathrm{~s} \) after a constant force of \( 2 \mathrm{kN} \) is applied to the rope wrapped around the inner hub of the pulley. The block is originally at rest.