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Let vec aa n d vec b be two non-colline...

Let ` vec aa n d vec b` be two non-collinear unit vector. If ` vec u= vec a-( vec adot vec b) vec ba n d vec v= vec axx vec b ,t h e n| vec v|` is `| vec u|` b. `| vec u|+| vec udot vec a|` c. `| vec u|+| vec udot vec b|` d. `| vec u|+ hat udot| vec a+ vec b|`

A

`|u|`

B

`|u|+|u.a|`

C

`|u| + |u.b| `

D

`|u| +u.(a +b)`

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The correct Answer is:
A
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ML KHANNA-ADDITION AND MULTIPLICATION OF VECTORS -Problem Set (2) (MULTIPLE CHOICE QUESTIONS)
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  4. If \ vec a\ a n d\ vec b are two unit vectors inclined at an angle t...

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  15. Let the points P, Q and R have position vectors r(1) = 3i-2j-k r(2...

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  16. Given the vectors a=3i-j+5k" and "b=i+2j-3k. A vector c which is perp...

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  17. IF veca, vecb, vecc are the position vectors of the vertices of an equ...

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  18. If a, b, c, d are the position vectors of points A, B, C and D respec...

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