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The vector that must be added to the vec...

The vector that must be added to the vector `hati-3hatj+2hatk` and `3hati+6hatj+7hatk` so that the resultant vector is a unit vector along the y-axis is

A

`4hati+2hatj+5hatk`

B

`-4hati-2hatj+5hatk`

C

`3hati+4hatj+5hatk`

D

Null vector

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The correct Answer is:
B
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ERRORLESS -VECTORS-Exercise
  1. Vector vec(A) makes equal angles with x-,y-,and z-axis. Find the value...

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  2. A vecA=2hati+4hatj-5hatk the direction of cosines of vector vecA are

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  3. The vector that must be added to the vector hati-3hatj+2hatk and 3hati...

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  4. How many minimum number of coplanar vector having different magnitudes...

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  5. A hall has the dimensions 10 m xx 12 m xx 14 m. A fly starting at one ...

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  6. 100 coplanar forces each equal to 10 N act on a body. Each force makes...

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  7. The magnitude of a given vector with end points(4, -4,0) and (-2, -2,0...

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  8. The expression (1/(sqrt(2))hat(i)+1/(sqrt(2))hat(j)) is a

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  9. The angle made by the vector vecA=2hati+3hatj with Y-axis is

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  10. The unit vector along hati+hatj is

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  11. A vector is represented by 3hati+2hatj+2hatk. Its length in XY plane i...

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  12. Five equal forces of 10 N each are applied at one point and all are ly...

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  13. Set the angles made by following vectors with x-axis in the increasing...

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  14. Any vector in an arbitrary direction can always be replaced by two (or...

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  15. Angular moment is

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  16. Which of the following is a vector

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  17. If vecP= vecQ then which of the following is NOT correct?

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  18. The positoin vector of a particle is vecr=(acos omegat)hati+(asinomega...

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  19. Which of the following is a scalar quantity

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  20. If a unit vector is represented by 0.5hati + 0.8hatj + chatk the value...

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