JEE Advanced2007MathematicsVector AlgebraActual
Let the vectors P Q , Q R , R S , S T , T U and UP represent the sides of a regular hexagon. Statement I PQ ( R S + S T ) 0 Statement II P Q R S = 0 and P Q S Q 0
Options
- AStatement I is true, Statement II is true; Statement II is a correct explanation for Statement I
- BStatement I is true, Statement II is true; Statement II is not a correct explanation for Statement I
- CStatement I is true, Statement II is false
- DStatement I is false, Statement II is true
Correct answer
C. Statement I is true, Statement II is false
Step-by-step solution
Since, P Q is not parallel to T R TR is resultant of S R and S T vectors. P Q ( R S + S T ) 0 But for Statement II, we have P Q R S = 0 which is not possible as P Q not parallel to R S . Hence, Statement I is true and Statement II is false.