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If a vector ofmagnitude 50 is collinear ...

If a vector ofmagnitude 50 is collinear with vector `vecb = 6 hat i - 8 hat j-15/2 hat k` and makes an acute anlewih positive z-axis then:

A

`24i-32j-30k`

B

`-24i+32j+30k`

C

`24i+32j-30k`

D

none of these

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A
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MCGROW HILL PUBLICATION-VECTOR ALGEBRA-SOLVED EXAMPLES (Level-1 Single Correct Answer Type Questions)
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  12. If abs(a)=1, abs(b)=2" and "abs(a-2b)=4" then "abs(a+3b) is equal to

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  14. If a, b, c are unit vectors, then the maximum value of abs(a+2b)^(2)+a...

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  16. The non-zero vectors are vec a,vec b and vec c are related by vec a= ...

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  19. Let veca =hatj-hatk and vecc =hati-hatj-hatk. Then the vector b satisf...

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  20. If a=1/sqrt(10)(3i+k)" and "b=1/7(2i+3j-6k), then the value of (2a-b)....

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