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What is unit vector?...

What is unit vector?

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What is the unit vector in the direction of veca=veci+vecj+2veck ?

If P(-1,2) and Q(3,-7) are two points, express the vector PQ in terms of unit vectors hati and hatj also, find distance between point P and Q . What is the unit vector in the direction of PQ ?

If veca is a nonzero vector of magnitude 'a' and lambda a nonzero scalar, then lambdaveca is unit vector if:

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if λ =1

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if a = |λ|

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if λ = - 1

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if a = 1/ |λ|

If veca is a non-zero vector of modulus a and m is a non-zero scalar, then mveca is a unit vector if

JBD PUBLICATION-KINEMATICS-EXAMPLE
  1. Is commutative law applicable too vector subtraction?

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  2. If overset rarr A = 2 hati + 5 hat j,what is the unit vector perpendic...

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  3. What is unit vector?

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  4. Is the magnitude of (overset rarr A - overset rarr B) same as that of ...

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  5. A vector of magnitude 5,makes an angle 60^@ with the y-axis .Express t...

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  6. At what points on the projectile trajectory is the speed minimum

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  7. What is the vertical component of velocity of a projectile at its maxi...

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  8. Shells of different masses are fired from a cannon at same angle with ...

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  9. A ball will project with a speed u at an angle of projection 30^@ has ...

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  10. At what angle ith the verticle should a projectile be projected so tha...

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  11. If u is the velocity of projection ,what is the value of maximum hori...

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  12. Name the quantity which remains unchanged during the flight of an obli...

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  13. How many directions of projection are possible for the same horizontal...

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  14. A bomb is dropped from an aeroplane when it is at a heigth h directly ...

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  15. A ball is thrown up and then it returns to the thrower .Is it a projec...

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  16. If the angle of projection fo a projectile is doubled ,will the horizo...

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  17. Write the relation between linear velocity (v),angular velocity(omega)...

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  18. What is the effect of air resistance on the time of flight and horizon...

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  19. State, for each of the following physical quantities, if it is a scala...

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  20. What is the essential condition for addition of two vectors?

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