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The magnitudes of mutually perpendicular...

The magnitudes of mutually perpendicular forces a,b and c are 2,10 and 11 respectively. Then the magnitude of its resultant is

A

12

B

15

C

9

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
`R=sqrt(4+100+121)=15`
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ARIHANT MATHS-VECTOR ALGEBRA-Exercise (Single Option Correct Type Questions)
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  4. If hati-3hatj+5hatk bisects the angle between hata and -hati+2hatj+2ha...

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  8. If vecx and vecy are two non-collinear vectors and ABC is a triangle w...

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  9. If vec xa n d vec y are two non-collinear vectors and a, b, and c r...

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  10. If the resultant of two forces is equal in magnitude to one of the ...

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  12. find the term independent of x in the expansion of (2x-1/x)^2 ?

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  13. If veca and vecb are two unit vectors and theta is the angle between t...

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  14. A, B, C and D have position vectors veca, vecb, vecc and vecd, repecti...

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  15. if alpha and beta are the root of the quadratic polynomial f(x) = x^2-...

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  16. If a +b+c = alphad, b+c+d=beta a and a, b, c are non-coplanar, then t...

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