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If a vector of magnitude 10 units along ...

If a vector of magnitude 10 units along x-axis multiplied by a constant number 4, then new vector will be

A

`-10hati`

B

`40hati`

C

`4hatj`

D

`2.5hatj`

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-MOCK TEST 4 -Example
  1. The component of a vector vecA along y-axis will have maximum value if

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  2. If hatn is a unit vector in the direction of the vector vecA, then

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  3. If a vector of magnitude 10 units along x-axis multiplied by a constan...

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  4. Five vectors, vecX, vecY, vecZ, bar (OB) and bar (AO) are connected as...

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  5. The angle that the vector bar (OA)= 5hati + 5hatj mix with y-axis is

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  6. If vecA=2hati + 3hatj and vecB= 5hati + 7hatj, then the vector having ...

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  7. A vector is not changed if

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  8. The unit vector of a vector vecA =2hati + 4hatj is

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  9. If vecA= a hati + 0.5hatj + 0.5hatk is unit vector, then value of a w...

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  10. If a vector bar(OP) = 3hati + 3hatj is turned clockwise by an angle of...

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  11. Which one of the following quantities is a scalar ?

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  12. The resultant vector of of bar(OA) = 2hati + 3hatj + 6hatk and bar(OB)...

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  13. The magnitude of resultant vectors of two vectors given by vecA = 10ha...

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  14. The velocity vector at a point A varies with time as vecv=ahati+bthat...

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  15. The velocity varies with time as vecv = ahati + bthatj , where a and ...

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  16. vecP is resultant of vecA and vecB. vecQ is resultant of vecA and -ve...

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  17. A particle moves along the parabolic path x = y^2 + 2y + 2 in such a w...

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  18. Resultant of two vectors vecA and vecB is of magnitude P, If vecB is r...

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  19. Two vectors of equal magnitude are acting through a point. The magnitu...

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  20. The resultant of two forces acting at an angle of 150° 10 kgwt, and is...

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