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Find a if the vectors vecx=2hati-3hatj+4...

Find a if the vectors `vecx=2hati-3hatj+4hatk` and `vecy=ahati+6hatj-8hatk` are collinear?

A

4

B

`-4`

C

2

D

`-2`

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Verified by Experts

The correct Answer is:
B
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For what value of 'a' the vectors 2hati-3hatj+4hatk and ahati+6hatj-8hatk are collinear?

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JMD PUBLICATION-VECTOR ALGEBRA-EXAMPLE
  1. Find x, y and z if vectors xhati-2hatj+zhatk=2hati-yhatj+hatk

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  2. If veca=2hati-hatj+hatk,vecb=3hati+2hatj-3hatk and vecc=hati+2hatj+hat...

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  3. Find a if the vectors vecx=2hati-3hatj+4hatk and vecy=ahati+6hatj-8hat...

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  4. Find p if vectors veca=2hati-hatj+phatk and vecb=hati-2hatj+hatk are p...

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  5. If veca is a unit vector and (vecx-veca).(vecx+veca)=255 then find |ve...

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  6. If veca=2hati+hatj+4hatk and vecb=3hati-2hatj+hatk then veca.vecb=

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  7. If |veca|=1,|vecb|=2 and veca*vecb=1. Then the angle between veca and ...

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  8. If |veca*vecb|=sqrt3|vecaxxvecb|,then angle between veca and vecb is :

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  9. Find |veca-vecb|, if two vectors veca and vecb are such that |veca|=2,...

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  10. Fill in the blanks : If veca=xhati+2hatj-3hatk and vecb=3hati+bhatj-...

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  11. Fill in the blanks : Unit vector in direction of 2hati-3hatj+6hatk=(...

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  12. Fill in the blanks : If veca=3hati+hatj-2hatk and vecb=hati+lamdahat...

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  13. If |veca*vecb|=|vecaxxvecb|,then angle between veca and vecb is :

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  14. Fill in the blanks : If |\vecaxxvecb|^2+(veca.vecb)^2=400 and |\vec...

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  15. State True/False The value of veca.veca is |\veca|^2.

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  16. State True/False If veca is unit vector and (2vecx-3veca).(2vecx+3ve...

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  17. State True/False Then magnitude of 2hati-3hatj+6hatk is 7 units.

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  18. Write the value of (hatixxhatj).k+(hatjxxhatk).hati.

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  19. Write the value of p for which veca=3hati+2hatj+9hatk and vecb=hati+ph...

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  20. Prove that : (vecaxxvecb)^2=|\veca|^2.|\vecb|^2-(veca.vecb)^2.

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