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A vector is represented by 3hati +hatj +...

A vector is represented by `3hati +hatj +2hatk` Its langth in Xy - plane is

A

2

B

`sqrt(14)`

C

`sqrt(10)`

D

`sqrt(5)`

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The correct Answer is:
C
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ALLEN-RACE-Basic Maths (VECTORS)
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  2. vecA+vecB+vecC=0 then |vecB|" and "|vecC| are:

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  3. A vector is represented by 3hati +hatj +2hatk Its langth in Xy - plane...

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  4. Resultant of two forces vecF(1) and vecF(2) has magnitude 50 N. Th...

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  5. alpha and beta are the angle made by a vector from positive x & positi...

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  6. If v=(3hati+2hatj+6k) m/s and m=(2)/(7)kg then find kinetic energy (i....

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  7. Two force vectors each having magnitude 6N are oriented as 30^(@) from...

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  8. Find the magnitude of the resultant of shown forces :-

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  9. If vecP=vec(KQ) (Here K is constant) them :-

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  10. The dot product of two vectors of magnitudes 3 units and 5 units canno...

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  11. If vecA=2hati+3hatj-hatk and vecB=-hati+3hatj+4hatk then projection of...

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  12. If |hatAxxhatB|=-sqrt(3)hatA.hatB, then |hatA-hatB|=…………………..

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  13. Find the torque of a force vecF=2hati+hatj+4hatk acting at the point v...

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  14. What is the value of linear velocity ,if if omega=3hati-4hatj+hatkand ...

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  15. The angle made by the vector vecA=hati+hatj with x-axis is

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  16. Two vectors vecA=3hati+2hatj+hatk" and "vecB=5hatj-9hatj+Phatk are per...

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

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  18. The vactor projection of a vector 3hati+4hatkon y-axis is

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  19. Consider two vectors vecF(1)=2hati+5hatk and vecF(2)=3hatj+4hatk. The ...

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  20. The component of vector A=a(x)hati+a(y)hatj+a(z)hatk and the directioi...

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