Required information

The instant shown, bar AB has an angular velocity of $4\mathrm{.}500$ra$($d$)/($s$)$ and an angular acceleration of

$2\mathrm{.}400$ra$($d$)/($s$^(2)),$ both clockwise.

Determine the angular acceleration of bar BD by using the vector approach.

The angular acceleration of bar BD is

ra$($d$)/($s$^(2))$ counterclockwise.