Problem $16\mathrm{.}018.$b $-$ Force at pins

The motor at $\backslash ($ A $\backslash )$ causes the support beam $\backslash ($ A B $\backslash )$ to have an angular velocity of $10$ rpm and zero angular acceleration at $\backslash (\backslash$theta$=60^\{\backslash$circ$\}\backslash ).$ At this instant, determine the vertical components of the forces exerted on platform $\backslash ($ B D $\backslash )$ by the pins at $\backslash ($ B $\backslash )$ and $\backslash ($ D $\backslash ).$

The vertical component of the force exerted by pin $\backslash ($ B $\backslash )$ is lb$.$

The vertical component of the force exerted by pin $\backslash ($ D $\backslash )$ is lb$.$