Question

PERPENDICULAR VECTORS:
a & b have the same direction. a has the magnitude of 8, and b has the magnitude of 5. What must be true about a & b?
A. They are opposites & parallel
B. They are parallel, but not equal
C. They are equal, but not parallel
D. They are opposites, but not parallel

a &b have opposite, but not different directions. a has a magnitude of 7, and b has a magnitude of 6. What must be true about a &b?
A. They are not parallel, opposites, or equal
B. They are parallel, but not equal
C. They are opposites and parallel
D. They are parallel, but not opposites

Answer 1

What do you think the answer is to the first part. If they have the same direction, then they must be parallel right? So which answer is correct?

Answer 2

I don't know, I don't know how to do these at all.
My guess for #1 is B

Answer 3

Yes B. They are in the same direction, but not the same length. Hence they must be parallel but not equal.

For the second question, draw yourself a diagram. What might the two vectors a and b look like?

Answer 4

I have no clue :(

Answer 5

Here's a simple diagram
a: <-------
b: ------>

They point in opposite directions.

Make sense?

Answer 6

Yes, sorry my connection is awful.

Answer 7

So it would be C?