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When adding vectors tip to tail, how do I add if they give me a direction, such as 50 degrees North of West?
I know that when you add a vector to another vector, you always start from the tip point when measuring the direction, not from the origin. I overheard some people in my class saying that if my second or later vector is 50 degrees North of West instead of just 50 degrees, then I measure that from the origin. Is that true?
1 Answer
- Mark PLv 79 years agoFavorite Answer
No, it is not.
The easy way to add(draw) a vector to another vector is to draw a small x-y coordinate system at the tip of the last(first) vector and measure your angle in this "new" x-y coordinate system. When you gain some experience and fill comfortable with graphical vector addition, you will not need "the new x-y coordinates". You will intuitively know to measure the angle from a horizontal line in the counterclockwise direction.
