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Personnel at an air post control tower t...

Personnel at an air post control tower track a UFO. At 11:02 am it was located at position A and at 11:12 am is was located at position B. Displacement vector of UFO is

A

`400hati+2200hatj+400hatk`

B

`1200hati+1000hatj+800hatk`

C

`2000hati+2200hatj+2000hatk`

D

`400hati+1000hatj+400hatk`

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The correct Answer is:
A
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ALLEN -UNIT & DIMENSIONS, BASIC MATHS AND VECTOR -Exercise (O-1) Single Correct Type Questions.
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  7. Two vectors veca and vecb add to give a resultant vecc=veca+vecb. In w...

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  8. If the angle between the unit vectors hata " and " hatb is 60^(@), the...

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  9. A man moves towards 3m north then 4 m towards east and finally 5 m tow...

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  10. The projection of a vector vec(r )=3hat(i)+hat(j)+2hat(k) on the x-y p...

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  11. A bird moves from point (1, -2) to (4, 2) . If the speed of the bird i...

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  12. Personnel at an air post control tower track a UFO. At 11:02 am it was...

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  13. A person pushes a box kept on a horizontal surface with force of 100 N...

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  14. For the given vector vec(A)=3hat(i)-4hat(j)+10hat(k), the ratio of mag...

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  15. Just after firing, a bullet is found to move at an angle of 37^(@) to ...

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  16. In a methane (CH(4) molecule each hydrogen atom is at a corner of a re...

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  17. If veca and vecb are two unit vectors such that veca+2vecb and 5veca-4...

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

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  19. A particle moves from position 3hati+2hatj-6hatk to 14hati+13hatj+9hat...

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  20. Which of the following is perpendicular to hati-hatj-hatk?

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