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The vector vecB= 5hati+2hatj-shatk is pe...

The vector `vecB= 5hati+2hatj-shatk` is perpendicular to the vector `vecA = 3hati+hatj+2hatk`for s =

A

1

B

`4.7`

C

`6.3`

D

`8.5`

Text Solution

Verified by Experts

The correct Answer is:
D
For `vecA` an d`vecB` to be perpendicular,
`vecA.vecB` =0
`=(5hati+2hatj-shatk).(3hati+hatj-2hatk)`
= 15 +2 -2s = 0
`implies" " s = 8.5`
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