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If hatn is a unit vector in the directio...

If `hatn` is a unit vector in the direction of the vector `vecA`, then:-

A

`hatn=(vecA)/(|vecA|)`

B

`hatn=vecA|vecA|`

C

`hatn=(|vecA|)/(vecA)`

D

`hatn=hatnxxvecA`

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The correct Answer is:
A
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ALLEN-BASIC MATHS-EXERCISE-2
  1. Which one of the following statement is false:

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  2. In vector diagram shown in figure where (vecR) is the resultant of vec...

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  3. If hatn is a unit vector in the direction of the vector vecA, then:-

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  4. Two vectors vecA and vecB lie in a plane, another vector vecC lies out...

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  5. The resultant of vecA and vecB makes an angle alpha with vecA and beta...

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  6. Vector vecP angle alpha,beta and gamma with the x,y and z axes respect...

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  7. The direction cosines of a vector hati+hatj+sqrt(2) hatk are:-

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  8. Two vectors vecA and vecB are such that vecA+vecB=vecC and A^(2)+B^(2)...

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  9. A vector perpendicular to (4hati-3hatj) may be :

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  10. Area of a parallelogram, whose diagonals are 3hati+hatj-2hatk and hati...

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  11. If vecA=2hati+4hatj and vecB=6hati+8hatj and A and B are the magnitude...

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  12. A force (3hati+2hatj) N displaces an object through a distance (2hati-...

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  13. A vector vecF(1) is along the positive X-axis. If its vectors product ...

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  14. The Bernoulli's equation is given by P+1/2 rho v^(2)+h rho g=k. Where ...

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  15. When a wave transverses in a medium, the displacement of a particle lo...

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  16. Which of the following system of units is not based on units of mass, ...

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  17. Which of the following is unitless quantity?

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  18. The dimensional formula of wave number is

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  19. The method of dimensional analysis can be used to derive which of the ...

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  20. Which of the following does not have the dimensions of force?

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