Problem $2\mathrm{.}1$ On the shaft shown in Figure below, a belt runs over a pulley at A which is $800$ mm diameter and rotates at $300$ rpm $.$ The belt tensions are $F_1=6kN$ and $F_2=4kN.$ The pitch diameter of the gear at $B$ is $100$ mm $.$ The forces acting on the gear are $F_a,F_r,$ and $F_t$ where $F_r=0\mathrm{.}36F_t$ and $F{a}_a=0\mathrm{.}5F_t.$ Bearings are selected so that bearing at leftend support carries axial load.