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The vector sum of two forces is perpendi...

The vector sum of two forces is perpendicular to their vector differences .In that case , the forces

A

equal to each other

B

equal to each other in magnitude

C

not equal to each other in magnitude

D

can not be predicted

Text Solution

Verified by Experts

The correct Answer is:
b
`veca xx vecb and vecb xx veca` are oppositely directed. So `theta= pi`.
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ICSE-COMPETITION CARE UNIT-VECTORS AND SCALARS [Selected from Previoius Years Engg. & Med. & IIT Exam Qns]
  1. If veca . vecb =ab then the angle between veca and vecb is

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  2. If |veca xx vecb| = ab then the angle between veca and vecb is

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  3. The vector sum of two forces is perpendicular to their vector differen...

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  4. Two vectors of equal magnitudes having a sum of resultant equal to eit...

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  5. The angle between veca xx vecb and vecb xx veca is

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  6. If the sum of two unit vectors is a unit vector, then the magnitude of...

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  7. If hatn is a unit vector in the direction of the vector vecA, then

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  8. If vec(A)=vec(B)+vec(C ), and the magnitudes of vec(A),vec(B),vec(C ) ...

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

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  10. The minimum number of vectors of equal magnitude needed to produce zer...

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  11. Given that veca + vecb = veca-vecb,. This can be true when

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  12. If veca * vecb = |veca xx vecb|, then this angle between veca and vecb...

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  13. The projection vector of veca" on "vecb is

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  14. The angle between two vectors veca and vecb is pi//2. Then |hata xx ha...

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  15. Given that veca * vecb = 0 and veca xx vecc = 0 Then the angle between...

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  16. There are n coplanar vectors each of magnitude m and each vector is in...

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  17. Given that veca and vecb are two non zero vectors, then the value of (...

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  18. The linear velocity of rotating body is given by vecv = vecomega xx ve...

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  19. The position vectors os a particle is r=(acosomegat)hati+(asinomegat)h...

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  20. The length of the sum of the vectors veca = 3hati and b = 4hatj is

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