Known values:

Problem Statement:

The beam is a W$8$x$10*$ steel beam, originally at rest and supported as pictured, until the hanger at B suddenly fractures. For the instant just after fracture of the hanger, determine the following:

$*$You might need to look up the designation in order to find the beam's weight. You also could look up the second moment of area for the beam's cross$-$section, which could be use to find the mass moment of inertia more accurately. However this computation is beyond the scope of our course. Since the beam's length is much greater than any of its other dimensions, please approximate the moment of inertia for this problem as simply a slender rod.

Answers:

The beam's mass:

The beam's angular acceleration: $($positive counterclockwise$)$

The horizontal acceleration component of the mass center: $($positive rightward$)$

The horizontal reaction at A : $($positive rightward$)$

The vertical acceleration component of the mass center: $($positive upward$)$

The vertical reaction at A : $($positive upward$)$

Be sure to include units with your answers.