Question

Consider the following vectors: v = 4i, w = j, how do you find the angle between v and w?

Answer 1

`90^@`

Explanation:

Since `hati` is a unit vector along the x-axis, vector v is 4 units along the positive x-axis.

Since `hatj` is a unit vector along the y-axis, vector w is 1 unit along the positive y-axis.

The x and y axes are perpendicular to each other hence so are the vectors.
We say these 2 vectors are orthogonal and hence their inner product will be zero, that is `v*w=0`