Question

How do you find a unit vector of 4i+3j?

Answer 1

`hatu=4/5i+3/5j`

Explanation:

`color(blue)("Using ratios")`

Let unit vector be `hatu`

`(j_2)/(j_1)=(i_2)/(i_1) =1/5`

`i_2=i_1/5 = 4/5`

`j_2=j_1/5 = 3/5`

`hatu=4/5i+3/5j`