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If a and b are two unit vectors such tha...

If a and b are two unit vectors such that a+2b and 5a−4b are perpendicular to each other, then the angle between a and b is

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PRADEEP PUBLICATION-VECTORS-EXERCISE
  1. If vec a = 6hat i - hat j+ 2hat k and vec b =hat i- 3hat j - 2 hat k, ...

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  2. What is the value of [vec a vec b vec c] if vec a, vec b, vec c are no...

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  3. If a and b are two unit vectors such that a+2b and 5a−4b are perpendic...

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  4. If vec a = 7 hat i +hat j - 4 hat kand vec b=2 hat i+6 hat j +3 hat k,...

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  5. What is the value of |hat a+ hat b + hat c| if hat a, hat b and hat c ...

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  6. If vec a=4 hat i -hat j +hat k and vec b =2hat i-2 hat j+hat k, then f...

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  7. Find λ and μ if (hat i+3 hat j+9 hat k) xx (3 hat i-λ hat j+μ hat k) =...

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  8. If vec a = 2hat i -3 hat j+ 3hat k and vec b =3 hat i- hat j - 4 hat k...

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  9. Classify the following measures as scalars and vectors, 10 g

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  10. Classify the following measures as scalars and vectors : 2 meters nort...

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  11. Classify the following measure as scalar and vector:40watt

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  12. Classify the following measures as scalars and vectors : 40 watt.

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  13. Classify the following measures as scalars and vectors : 10^(-19).

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  14. Classify the following measures as scalars and vectors: 20 m/s

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  15. Classify the following as scalar and vector quantities: time period

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  16. Classify the following as scalar and vector quantities: distance

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  17. Classify the following as scalar and vector quantities: force

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  18. Classify the following as scalar and vector quantities: velocity

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  19. Classify the following as scalar and vector quantities:work done

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  20. Answer the following ad true or false : veca and -veca are collinear.

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