Parrellel vectors

[Vikash]

Can parellel vectors be in opposite directions??

 

[Romsek]

Two vectors in exactly opposite directions in a flat plane are always going to be parallel.

 

[Vikash]

Two vectors in exactly opposite directions in a flat plane are always going to be parallel.

So parellel vectors direction doesnt matter right...they have to just be scalar multiples of each other....is it??

 

[Romsek]

So parellel vectors direction doesnt matter right...they have to just be scalar multiples of each other....is it??

that's a good way of describing it yes, though I'd add nonzero to it.

 

[pka]

So parellel vectors direction doesnt matter right...they have to just be scalar multiples of each other....is it??

Two non-zero vectors are parallel if and only if there are scalar multiples of one another. The scalar can be positive or negative.
If the scalar is negative then their directions are opposite.