- #1

afrocod

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## Homework Statement

_{A uniform rod AB of weight W rests in equilibrium with the end A in contact with a smooth vertical wall and the end B in contact with a smooth plane inclined at 45 to the wall. Find the reactions at A and B in terms of W.}

## Homework Equations

_{The sum of the three forces equal zero.}

## The Attempt at a Solution

_{Well having a look at the answer is W and √2W, it's obviously a square and the rod must be perpendicular to the inclined plane. So how could I know that it was perpendicular to the plane. What indicated that or how can I prove that assumption to myself?}