Thread: Vector problem
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Old July 3rd, 2009, 01:09 PM
running-gag running-gag is offline
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Originally Posted by chengbin View Post
maylaygoel, thanks for your explaination.

It makes sense, but I don't get how you got your explanation. I can't imagine an arbitrary point in my mind, which is the main reason I have so much trouble learning vectors.

Do you mind explaining this?

\overrightarrow {PD} = (\overrightarrow {b}+\overrightarrow {BD})
Well since \overrightarrow {b} is the position vector of B from point P it comes \overrightarrow {PB} = \overrightarrow {b}

And then \overrightarrow {PD} = \overrightarrow {PB}+\overrightarrow {BD} = \overrightarrow {b}+\overrightarrow {BD}
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