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What is the projection of vecA on vecB ?...

What is the projection of `vecA` on `vecB` ?

A

`vecA.vecB`

B

`vecA.hatB`

C

`vecB.vecA`

D

`vecA.hatB`

Text Solution

Verified by Experts

The correct Answer is:
B
Projection of `vecA` on `vecB` is A `cos theta` in direction of `vecB` ltbr. `vecA,vecB=AB cos thetarArrA cos theta =(vecA.vecB)/(B)=vecA.hatB`
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ALLEN-BASIC MATHS-EXERCISE-1
  1. Vector sum of two forces of 10N and 6N cannot be:

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  2. The unit vector along hati+hatj is :

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  3. What is the projection of vecA on vecB ?

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  4. What is the angle between vecA and the rsultant of (vecAhatB) and (vec...

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  5. The angle between vectors (hati+hatj) and (hatj+hatk) is :

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  6. The angle between two vectors given by (6hati+6hatk) and (7hati+4hatj+...

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  7. Which of the following vector identies is false ?

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  8. If the vectors (hati+hatj+hatk) and 3 hati form two sides of a triangl...

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  9. Which pair of the following forces will never give resultant force of ...

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  10. If hatn=ahati+bhatj is perpendicualr to the vector (hati+hatj), then t...

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  11. Two force each numerically equal to 10 dynes are acting as shown in th...

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  12. What is the component of (3hati+4hatj) along (hati+hatj) ?

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  13. If vecA+ vecB = vecC and A+B+C=0, then the angle between vecA and vec...

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  14. If vecA+veB is a unit vector along x-axis and vecA=hati-hatj+hatk, the...

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  15. What is the value of (vecA+vecB),(vecAxxvecB) ?

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  16. If vecAxxvecB=vec0 and vecBxxvecC=vec0, then the angle between vecA an...

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  17. The resultant of vecA and vecB is perpendicular to vecA. What is the a...

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  18. The resultant of vec(A)+vec(B) is vec(R )(1). On reversing the vector ...

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  19. Given that A=B. What is the angle between (vecA+vecB) and (vecA-vecB) ...

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  20. The angle between the two vectors vecA=3hati+4hatj+5hatk and vecB=3hat...

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