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vec A + vec B is unit vector along y-...

`vec A + vec B ` is unit vector along y-axis . If `vec A =- hati - hatj + hatk.` Then what is ` vec B` ?

A

`hati - hatj + hatk `

B

`hati + 2 hatj - hatk `

C

`hati - 2 hatj - hatk `

D

`- hat i - 2 hatj + hatk`

Text Solution

Verified by Experts

The correct Answer is:
B
`vec A + vec B = hatj implies - hati - hatj + hatk + vec B = hatj `
`vec B = hati + 2 hatj - hatk`
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