# Thread: some properties of vectors - there is a point I don't understand it

1. ## some properties of vectors - there is a point I don't understand it

Hi

Two vectors A and B are equal if they have the same magnitude and the same direction . this property allows us to translate a vector parallel to itself in a diagram without affecting the vector . In fact , for most purposes, any vector can be moved parallel to itself without being affected .

can you give me an example of that point

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When two or more vectors are added , they must all have the same units . It would be meaningless to add a velocity cector to a displacement vector .

what that mean ?

2. Originally Posted by r-soy
Hi

Two vectors A and B are equal if they have the same magnitude and the same direction . this property allows us to translate a vector parallel to itself in a diagram without affecting the vector . In fact , for most purposes, any vector can be moved parallel to itself without being affected .

can you give me an example of that point

Take a drawing of a parallelepiped, say a dice. Then any two parallel sides of any of the dice's faces represent exactly the same vector. Thus, you have 4 parallel sides in a dice which, as sides, are all different, but which as vectors are the same thing.

Tonio

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When two or more vectors are added , they must all have the same units . It would be meaningless to add a velocity cector to a displacement vector .

what that mean ?
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