Also,

$V_{AB}^t=\frac{d_A{n}_A}{60000}=$

$W_{AB}^t=\frac{H}{V_{AB}^t}=$

$T_{aA}=W_{AB}^t(\frac{d_A}{2})=$

$T_{bB}=W_{AB}^t(\frac{d_B}{2})=$

From, ${\displaystyle \underset{?}{\overset{?}{}}}{M}_b=0,T_{bB}-T_{bC}=0,$

$T_{bC}=T_{bB}=$

Draw free$-$body diagrams of gears $D,$ and $E,$ and show all forces with their proper directions, similarly speeds and torques with directions, on each element below: