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10 February, 14:11

I am trying to find the magnitude of a resultant vector. Do i take inconsideration the negatives when i find the x & y components of the two vectors

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  1. 10 February, 15:34
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    Absolutely! If you have two vectors with equal magnitudes and opposite

    directions, then one of them is the negative of the other. Their correct

    vector sum is zero, and that's exactly the magnitude of the resultant vector.

    (Think of fifty football players pulling on each end of the rope in a tug-of-war.

    Their forces are equal in magnitude but opposite in sign, and the flag that

    hangs from the middle of the rope goes nowhere, because the resultant

    force on it is zero.)

    This gross, messy explanation is completely applicable when you're totaling up

    the x-components or the y-components.
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