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If vecA and vecB are perpendicular vecto...

If `vecA` and `vecB` are perpendicular vectors and vector `vecA=5hati+7hatj-3hatk` and `vecB=2hati+2hatj-ahatk`. The value of `a` is

A

`-2`

B

8

C

`-7`

D

`-8`

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Verified by Experts

The correct Answer is:
D
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ERRORLESS -VECTORS-Exercise
  1. Find the torque of a force vecF= -3hati+hatj+5hatk acting at the poin...

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  2. the value of (vecA+vecB)xx(vecA-vecB) is

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  3. If vecA and vecB are perpendicular vectors and vector vecA=5hati+7hatj...

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  4. A body, under the action of a force vec(F)=6hati -8hatj+10hatk , acqui...

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  5. Area of a parallelogram formed by vectors (3hati-2hatj+hatk)m and (hat...

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  6. The position vectors of radius are 2hati+hatj+hatk and 2hati-3hatj+hat...

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

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  8. Dot product of two mutual perpendicular vector is

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  9. When vecA.vecB=-|A||B|, then

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  10. If |vecAxxvecB|=sqrt(3) vecA.vecB, then the value of |vecA+vecB| is

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  11. A force vecF=3hati+chatj+2hatk acting on a particle causes a displacem...

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  12. A force vecF=(5hati+3hatj)N is applied over a particle which displaces...

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  13. If a vector vec(A) is parallel to another vector vec(B) then the resul...

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  14. P, Q and R are three coplanar forces acting at a point and are in equi...

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  15. P, Q and R are three coplanar forces acting at a point and are in equi...

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  16. If a body is in equiliburium under a set of non-collinear forces, then...

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  17. How many minimum number of coplanar vector having different magnitudes...

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  18. As shown in figure the tension in the horizontal cord is 30 N. The wei...

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  19. Two cars are moving in the same direction with the same speed 30 km//h...

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  20. A man standing on a road has to hold his umbrella at 30^0 with the ver...

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