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A displacement vector, at an angle of 30...

A displacement vector, at an angle of `30^(@)` with y-axis has an x-component of `10` units. Then the magnitude of the vector is-

A

5

B

10

C

11.5

D

20

Text Solution

Verified by Experts

The correct Answer is:
D
`cos 60^(@)=10/(r) rArr r=10/(1//2)=20` units
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ALLEN -MISCELLANEOUS-Exercise-01
  1. The resultant of two vectors vec(P) and vec(Q) is vec(R). If vec(Q) is...

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

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  3. A displacement vector, at an angle of 30^(@) with y-axis has an x-comp...

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  4. I started walking down a road in morning facing the sun. After walking...

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  5. A bird moves from point (1 m, -2 m, 3 m) to (4 m, 2 m, 3 m). If the sp...

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  6. Any vector in an arbitrary direction can always be replaced by two (or...

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  7. There are two forces vectors, one of 5N and other of 12N at what angle...

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  8. A particle has displacement of 12m towards east and 5 m towards north ...

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  9. 21 coplanar non collinear forces (all of equal magnitude) maintain a b...

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  10. A vector vecA points vertically upward and vecB points towards north. ...

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  11. If |vec(A)xxvec(B)|=sqrt(3)vec(A).vec(B), then the value of |vec(A)+ve...

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  12. The projection of vec(A) on vec(B) is :-

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  13. Given that P=Q=R. If vec(P)+vec(Q)=vec(R) then the angle between vec(P...

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  14. At what angle must the two forces (X+y) and (x-y) act so that the re...

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  15. The value of (vec(A)+vec(B)).(vec(A)xxvec(B)) is :-

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  16. The projection of vector, vec(r)=3hat(i)+hat(j)+2hat(k), on the x-y pl...

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  17. Two balls are rolling on a flat smooth table. One ball has velocity co...

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  18. Select incorrect statement

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  19. If vec(e(1)) and vec(e(2)) are two unit vectors and theta is the angle...

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  20. Three concurrent forces of the same magnitude are in equilibrium. What...

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