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If angle between veca and vecb is pi/3, ...

If angle between `veca` and `vecb` is `pi/3`, then angle between `veca` and `-3vecb` is

A

`(pi)/(3)`

B

`(2pi)/(3)`

C

`(pi)/(6)`

D

`(5pi)/(3)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-MOTION IN A PLANE-EXERCISE-A (Vectors & Scalars)
  1. Choose the correct statement.

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  2. Choose the false statement

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  3. The pair containing a scalar quantity and vector quantity is

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  4. Which one of the following statements is true ?

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  5. Which of the following units could be associated with a vector quantit...

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  6. The set containing only vector quantities is

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  7. Which of the following is meaningful?

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  8. Choose the correct statement.

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  9. If angle between veca and vecb is pi/3, then angle between veca and -3...

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  10. Which one of the following is a null vector ?

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  11. Consider the quantities, pressure, power, energy, impulse, gravitation...

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  12. Gibbs-Helmoholtz equation relates the free energy change to the enthal...

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  13. The component of a vector is

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  14. The horizontal component of the weight of a body of mass m is

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  15. What are the maximum number of rectangular components of a vector can ...

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  16. The maximum number of components into which a vector can be resolved i...

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  17. The component of a vector r along X-axis will have maximum value if :

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  18. The x-component of the resultant of several vectors

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  19. Figure shows the orientation of two vectors u and v in the XY-plane If...

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  20. Read each statement below carefully and state with reason and examples...

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