## Direction of a moment

Hi all, please view the file I have attached which contains the diagram of the question. The picture is a cross section of a cantilever beam in which a force is applied downwards at the tip of the beam, as shown in the upper diagram. The solutions then conclude that the moment is acting in a perpendicular direction to the force, as shown in the bottom diagram. Why is this?

Thanks!
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 Recognitions: Homework Help Think about what the vector r x F means in terms of its components. As a memory aid: i j k | i j which means: i X j = k; j x k = i; k x i = j got a right-hand coordinate system.
 That moment has nothing to do with that force. That looks like half of an illustration to draw stress squares and Mohr's circles. Where did you get that? What is it supposed to mean?

Recognitions:
Homework Help