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November 01, 2025, 03:18:45 pm
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Author Topic: Triangular forces question  (Read 635 times)  Share 

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meli001

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Triangular forces question
« on: August 30, 2011, 08:24:25 pm »
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So I was wondering how they got from the first diagram to the triangle one.

Thanks :)
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davidle_10

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Re: Triangular forces question
« Reply #1 on: August 30, 2011, 08:42:26 pm »
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Forces are vectors, the second diagram is just the force vectors added together.
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b^3

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Re: Triangular forces question
« Reply #2 on: August 30, 2011, 08:47:45 pm »
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Yeh it's just shifting the arrows arrow (while keeping the same orientation, i.e. point the same way) so that the ends met and 2 lines add (as vectors) to give the other vector.
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meli001

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Re: Triangular forces question
« Reply #3 on: August 30, 2011, 09:09:11 pm »
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Oh. Right. So why is it 60 degrees? And how did the 180-theta come about? Sorry, I know they're really dumb questions.
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b^3

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Re: Triangular forces question
« Reply #4 on: August 30, 2011, 09:17:25 pm »
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When you moved then arrow, you are aligning the arrow to the opposite side of the other arrow, so the anglee between the two won't be the same. It's hard to exlpain, imaging moving the lines while keeping them pointing in the same direction. The 180-theta comes about about because of this. I hope this makes sense.
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