TITLE: Which part of an angular velocity vector is its direction?
QUESTION [0 upvotes]: I am assuming that an angular velocity vector only has two direction: positive for counterclockwise and negative for clockwise.
Just to make sure that I have the right interpretation.
Newton's 1st law states:

An object remains in a state of uniform rotational motion unless acted upon by a net torque. ("In a straight line" is taken out)

This means that the speed of the angular velocity vector is constant. However, even without an net torque, the direction will change. how?
Edit. I just googled Newton's 1st Law. It only says uniform motion in a straight line. Does it mean the object can travel back and forth along the line?

REPLY [1 votes]: By uniform motion in a straight line, the law refers to both its magnitude and direction. You can't go back and forth without a force.
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