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Find the torque of a force vecF=2hati+ha...

Find the torque of a force `vecF=2hati+hatj+4hatk` acting at the point `vecr=7hati+3hatj+hatk` :

A

`14hati-38hatj-16hatk`

B

`4hati+4hatj+6hatk`

C

`-14hati+38hatj-16hatk`

D

`11hati-26hatj+hatk`

Text Solution

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The correct Answer is:
D
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ALLEN-RACE-Basic Maths (VECTORS)
  1. If vecA=2hati+3hatj-hatk and vecB=-hati+3hatj+4hatk then projection of...

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

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

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  4. What is the value of linear velocity, if vecomega=3hati-4hatj+hatk and...

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

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  6. Correct relation is :

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

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

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  9. The vector projection of a vector 3hat(i)+4hat(k) on y-axis is

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

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  11. When vecA.vecB=-|vecA||vecB|, then :-

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

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  13. (vecA+2vecB).(2vecA-3vecB):-

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  14. If vecA=3hati+4hatj and vecB=6hati+8hatj, select correct alternatives ...

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  15. The angle between the vectors (hati+hatj) and (hatj+hatk) is

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  16. vecA, vecB and vecC are vectors each having a unit magneitude. If ...

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  17. vecA and vecB and vectors expressed as vecA = 2hati + hatj and vecB = ...

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  18. The velocity of a particle is v=6hati+2hatj-2hatk The component of the...

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  19. Two vectors vecA=4hati+alphahatj+2hatk" and "vecB=2hati+hatj+hatk are ...

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  20. If vector hati+hatj-hatk" and "2hati+2hatj+lambdahatk are parallel tha...

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