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The resultant of two vectors vec(P) and ...

The resultant of two vectors `vec(P)` and `vec(Q)` is `vec(R )`. If the magnitude of `vec(Q)` is doubled, the new resultant vector becomes perpendicular to `vec(P)`. Then, the magnitude of `vec(R )` is equal to

A

P+Q

B

Q

C

P

D

`(P+Q)/(2)`

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The correct Answer is:
B
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TARGET PUBLICATION-SCALARS AND VECTORS-Critical Thinking
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  4. The resultant of two vectors vec(P) and vec(Q) is vec(R ). If the magn...

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  7. If a 4hat(i)+3hat(j)+8hat(k) is perpendicular to the vector 4hat(j)-4h...

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  8. A force vec(F)=3hat(i)+chat(j) +2hat(k) acting on a particle causes a ...

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  10. If vec(P)=hat(i)-2hat(j)-3hat(k)and vec(Q)=4hat(i)-2hat(j)+6hat(k) , t...

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  11. Choose the CORRECT statement.

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  12. The sine of the angle between 3hat(i)+hat(j)+2hat(k)and 2hat(i)-2hat(j...

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  13. If vec(A).vec(B)=0andvec(A)xxvec(B)=0, then which of the following con...

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  14. If the ratio of the dot product of two vectors and cross product of sa...

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  16. If vec(a) and vec(b) are two vectors then the value of (vec(a) + vec(b...

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  17. Given vec(p)*(vec(P)+vec(Q))=P^(2) then the angle between vec(P)andvec...

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  18. Assertion : If dot product and cross product of vec(A)andvec(B) are ze...

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  19. Assertion : vec(A)xxvec(B) is perpendicular to both vec(A)+vec(B) as w...

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  20. A small ball is hung by a string fixed to a wall. The ball is pushed a...

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