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Let bara and barb be two non-collinear u...

Let `bara and barb` be two non-collinear unit vectors. If `baru=bara-(bara.barb)barb and barv=bara xx barb`, then `|barv|=`

A

`|baru|`

B

`|bara|`

C

`|barb|`

D

`|bara||barb|`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If barmu =bara-barb, barv=bara+barb and absbara=absbarb, " then " barmu.barv is

    A
    `lt 0`
    B
    `gt0`
    C
    `2absbara^(2)`
    D
    0

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    A
    `[bara barb barc]`
    B
    `2[bara barb barc]`
    C
    `3[bara barb barc]`
    D
    0

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    A
    1)-15
    B
    2)`-15/2`
    C
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    D
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