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Given a+b+c+d = 0 which of the following...

Given a+b+c+d = 0 which of the following statement is incorrect

A

a, b, c and d must each be a null vector.

B

The magnitude of (a+c) equals the magnitude of (b+d)

C

The magnitude of a can never be greater than the sum of the magnitudes of b, c and d.

D

b+c must lie in the plane of a and b is a and d are not collinear, and in the line of a and d, if they are collinear

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The correct Answer is:
A
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AAKASH SERIES-MOTION IN A PLANE -Exercise -II
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  2. The magnitudes of two vectors vec(P) and vec(Q) differ by 1. The magni...

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  3. Given a+b+c+d = 0 which of the following statement is incorrect

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  4. The resultant of two forces 2P and sqrt(2) P is sqrt(10)P The angle be...

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  5. Eleven forces each equal to 5N act on a particle simultaneously. If ea...

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  6. Which of the following sets of forces acting simultaneously on a parti...

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  7. The resultant of two forces 1 and P is perpendicular to .1. and equal ...

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  8. If the sum of two unit vectors is also a vector of unit magnitude, the...

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  9. If vec(P) + vec(Q) = vec(R) and vec(P) - vec(Q) = vec(S), then R^(2) +...

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  10. vec(P), vec(Q), vec(R), vec(S) are vector of equal magnitude. If vec(P...

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  11. The greater and least resultant of two forces are 7 N and 3 N respecti...

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  12. Two forces are such that the sum of their magnitudes is 18 N, the resu...

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  13. Figure shows three vectors vec(a), vec(b) and vec(c), where R is the m...

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  14. In an equilateral triangle ABC, AL, BM and CN are medians. Forces alon...

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  15. The resultant of two vectors vec(P) and vec(Q) is vec(R). If the magni...

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  16. If .O. is at equilibrium then the values of the tension T(1) and T(2) ...

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  17. A body of mass sqrt(3) kg is suspended by a string to a rigid support....

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  18. Two light strings of length 4 cm and 3 cm are tied to a bob of weight ...

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  19. A body is hanging from a horizontal branch of a tree. The tension in t...

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  20. If .P. is in equilibrium then T(1)//T(2) is

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