MHT CET202013 Oct 2020Evening ShiftPhysicsMathematics in PhysicsActual
The sum of the magnitudes of two vectors A and B is 8 and magnitude of the resultant is 4. If the resultant vector is perpendicular to any one vector, then the magnitudes of the two vectors A and B are
Options
- A3,5
- B2,6
- C4,4
- D1, 7
Correct answer
A. 3,5
Step-by-step solution
aligned &| A |=5 &| B |=8-5 &=3 aligned | A + B |=4| A |+| B |=8 abo . A |²=| B |²| R |²| A |²=(8-| A |)²+4²| A |²=64+| A |²-16| A |+16580=16| A | A = 5