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The projectionof hati-hatj on z axis:...

The projectionof `hati-hatj` on z axis:

A

1

B

2

C

3

D

0

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The correct Answer is:
D
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Find the projection of : (i) hati-hatj on Z-axis (ii) hati+2hatj-2hatk on 2hati-hatj+5hatk (iii) 3hati+hatj-hatk on 4hati-hatj+2hatk

hati.hatj is

If the projection of 5hati-hatj-3hatk on the vector hati+3hatj+lambdahatk is same as the projection of hati+3hatj+lambdahatk on 5hati-hatj-3hatk" " then lambda is equal to.

The sum of the projection of 2hati+hatj+2hatk on the coordinate axis is :

Find the projection of the vector hati-hatj on the vector 7hati+hatj .

Find the projection of the vector hati+3hatj+7hatk on the vector 2hati+6hatj+3hatk .

Statement1: A component of vector vecb = 4hati + 2hatj + 3hatk in the direction perpendicular to the direction of vector veca = hati + hatj +hatk is hati - hatj Statement 2: A component of vector in the direction of veca = hati + hatj + hatk is 2hati + 2hatj + 2hatk

The unit vector which is orthogonal to the vector 3hati+2hatj+6hatk and is coplanar with the vectors 2hati+hatj+hatk and hati -hatj+hatk is

PREMIERS PUBLISHERS-APPLICATIONS OF VECTOR ALGEBRA-PROBLEMS FOR PRACTICE (Choose the correct answer)
  1. The force vecF=2hati+2hatj-2hatk acting at the point hati-2hatj+hatk i...

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  2. If |veca|=5|vecb|=4 and |veca+vecb|=1 then |veca-vecb|=?

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  3. The projectionof hati-hatj on z axis:

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  4. Given veca*vecc=4, veca*vecd=3, vecb*vecc=2, vecb*vecd=3. Then value o...

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  5. The vector vec(AB)=3hati+2hatj+2hatk and vec(BC)= - hati-2hatk are adj...

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  6. If the angle between the lines having direction ratios (alpha, 3,5) an...

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  7. Let a, b, c be distinct non negative numbers. The vectors ahati+a hatj...

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  8. hati *(hatj xx hatk) +hatj(hatk xx hati) +hatk (hati xx hatj) is :

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  9. If veca is any vector then the value of Sigma (veca xx veci)^(2) is :

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  10. If (1-p)hati+2(1+p)hatj+(3+p)hatk and 3hati+hatj are at right angle to...

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  11. [veca, veca+vecb, veca+vecb+vecc] is :

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  12. The sum of the projection of 2hati+hatj+2hatk on the coordinate axis i...

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  13. If veca=hati-2hatj+hatk, vecb=hati+2hatj+3hatk, vec c=3hati+2hatj+hatk...

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  14. veca=2hati+3hatj-hatk vecb=hati-hatj-m hatk vec c= -hati+2hatj+hat...

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  15. The work done by the force vecF=2hati-3hatj+2hatk in moving a particle...

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  16. The area of the triangle formed by the points where position vector ar...

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  17. veca=hati-hatj+hatk, vecb=2hati+hatj-hatk, vec c=lambda hati-hatj+lamb...

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  18. If the equations 2x-lambday+5z=7 and lambda x-8y-10z+14=0 represent th...

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  19. Find the odd one out in the following :

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  20. Find the correct statement in the following given four points A, B, C,...

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