/lit/ - Literature

at first I thought this sounded stupid because even if it is at 'rest' it still has an acting force on it and therefore movement but this isn't true since all external forces are reducible to internal stresses.

You could simply look at the arrow in terms of tensors, in this way the direction of any force applied cancels out since the stress vector and force vector will always act in opposite directions to each other, meaning you end up with just a general magnitude of stress on the arrow but no movement or direction