Spin-up #4-02

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EEpowerOK

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I must be missing something on this problem, there are 2 sequence vectors shown.

The one on the left has a clockwise rotation symbol (negative seq.) and the sequence of the maxima occur abc (positive seq).

The one on the right has a counter clockwise rotation symbol (positive seq.) and the sequence of the maxima occur cba (negative seq.)

Which defines the sequence type? Looks like one is positive and the other is negative.

 
Glad I'm not the only one confused...

To me, both look like positive sequence... If you follow the vectors on the left counterclockwise (as the arrow shows), I see ABC

If you follow vectors on the right clockwise (as the arrow shows), I see ABC again... ABC= positive

But the answer is negative sequence for both... My references agree with spin-up's answer... But I just don't see it. Can anyone explain why these aren't positive if the arrows direction shows ABC sequence for both??? I have a feeling the answer is simple but I can't figure it out!

 
Glad I'm not the only one confused... To me, both look like positive sequence... If you follow the vectors on the left counterclockwise (as the arrow shows), I see ABC If you follow vectors on the right clockwise (as the arrow shows), I see ABC again... ABC= positive But the answer is negative sequence for both... My references agree with spin-up's answer... But I just don't see it. Can anyone explain why these aren't positive if the arrows direction shows ABC sequence for both??? I have a feeling the answer is simple but I can't figure it out!
I agree, if you follow the arrows they are both ABC, rules of sym components, that I have read, define the rotation direction. I don't think the rotation is arbitrary. So, are the letters would have to be arbitrary which one would be positive and the other negative. Screwed up question.

 
It is really simple. If you just look at one vector at a time. Maybe cover the other with a piece of paper. Draw a stick figure to the right of the vector. This is you standing watching the vector spin. Spin the vector in the direction of the arrow while you stand still. If you get ABC in that order it is positive. If you get BAC it is negative.

 
I got it now! Imagining myself as a stick figure on the page cleared it all up for me! (Seriously).

Thanks for the explanation... I figured it was easy; Hope it clicks for you too EEpowerOK

 
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