$(2$ points$).$ Figure $3$ shows a cylindrical drum of $0\mathrm{.}3$ m diameter mounted on a shaft with a right$-$angle cranked handle. The shaft is supported in frictionless bearings at A and $B$ and is maintained in equilibrium by a force $F=29\mathrm{.}4N(3kg9\mathrm{.}81)N$ applied to the handle.

The vertical reaction at $A($upwards positive$)$ is

Figure $3$

$\backslash$table$[[,$A$,$B$,$C$,$D$,$E$,$F$,$G$,$H$,$I,J$],[$R$\_($A$)=($N$),3,4\mathrm{.}25,6,8\mathrm{.}75,10,29\mathrm{.}4,-41\mathrm{.}7,58\mathrm{.}9,79\mathrm{.}3,85\mathrm{.}8],[$check one only,,,,,,,,,,$]]$