# Homework Help: Vector and scalar addition

1. Feb 8, 2014

### Tiven white

1. The problem statement, all variables and given/known data
T/F: The addition of two scalars is equivalent to the addition of parallel vectors.
Select one:
a. False
b. True

2. Relevant equations

3. The attempt at a solution
i said true reason being the magnitude of vectors can be added if they are in the same direction by tail to tip method.
is this correct?

2. Feb 8, 2014

### PhanthomJay

I wouldn't say so. Although the magnitudes may be the same, vector addition still has direction, scalars ahve none. What if the parallel vectors are in opposite directions?

3. Feb 8, 2014

### jackarms

I'd say it's true. I think by "equivalent" it means that the two are just analagous, so for scalars you just add the magnitudes, and for parallel vectors you also just add the magnitudes. I think by "parallel" it implies that they are both in the same direction, instead of being anti-parallel.

4. Feb 8, 2014

### PhanthomJay

Maybe yes. But we have to guess what is meant by 'equivalent' and to a certain extent, 'parallel' vectors. I think the question needs to be tossed in the trash.