Question

If the dot product of two non-zero vectors v1 and v2 is zero, what does this tell us?

A. v1 is perpendicular to v2.
B. v1 is parallel to v2.
C. v1 = v2
D. v1 is a component of v2.

Answer 1

B is my answer....

Answer 2

ab = |a||b|cos(theta)
where theta is the angle between them

Answer 3

b is wrong

Answer 4

Oh wait! perpendicular - A

Answer 5

if a,b are not 0 vectors what does theta need to be for them to be 0?

Answer 6

the dot product is a measure of collinearity... the Cauchy-Schwarz inequality tells us this. if the dot product is \(0\) they have the lowest degree of collinearity

Answer 7

correct

Answer 8

I wrote down the wrong one....