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When two vectors vecA and vecB of magnit...

When two vectors `vecA` and `vecB` of magnitudes `a` and `b` respectively are added, the magnitude of resultant vector is always

A

equal to (a +b)

B

less than (a +b)

C

greater than (a+b)

D

greater than (a +b)

Text Solution

Verified by Experts

The correct Answer is:
D
`|vecA + vecB| = sqrt(a^(2) + b^(2) + 2ab cos theta)`
`-1le costhetale1`
Then, not greater than a+ b.
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GRB PUBLICATION-VECTORS-OBJECTIVE QUESTIONS
  1. For the fig. 350 :

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  2. A vector may change if :

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  3. When two vectors vecA and vecB of magnitudes a and b respectively are ...

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  4. The rectangular compounts of forces of 5 duye are :

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  5. To get a rsultant displacement of 10m, two displacement vectors, o...

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  6. A magnitude of vector vecA,vecB and vecC are respectively 12, 5 and 13...

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  7. If vecA = vecB + vecC and the magnitudes of vecA, vecB and vecC are ...

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  8. If two waves of same frequency and same amplitude superimpose and prod...

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  9. The angle between (vecA xx vec B) and (vecB xx vecA ) is :

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  10. Two equal vector have a resultant equal to either of them, then the an...

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  11. The resultant of two forces acting an anlge of 120^(@) is 10 kg wt and...

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  12. The vectorsvecA and vecB uur are such that |vecA + vecB| =|vecA-vecB ...

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  13. For the resultant of two vectors to be maximum , what must be the ...

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  14. What are minmum number or unequal fores whose vector sum is zero ?

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  15. Two vectors vecA and vecB lie in a plane, another vector vecC lies out...

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  16. Two forces of magentude 7 newton and 5 newton act on a particle a...

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  17. Two forces of 4 dyne and 3 dyne act upon a body . The resultant ...

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  18. A force of 6 kg and another of 8 kg can be applied togther to pr...

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  19. Out of the following the resultant of which cannot be 4 netwon ?

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  20. In case of three vector quanitites of same type, whose resultant c...

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