Home
Class 11
PHYSICS
For two vectors A and B, |bar(A) + bar(B...

For two vectors A and B, `|bar(A) + bar(B)| = |bar(A) - bar(B)|` is always true when
(i) `|bar(A)| = |bar(B)| ne 0` (ii) `A bot B`
(iii) `|bar(A)| = |bar(B)| ne 0` and A and B are parallel or anti parallel
(iv) When either A or B is zero.

A

(i) and (ii) are true

B

ii, iii and iv are true

C

i, ii and c are true

D

ii and iv are true

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise Exercise -II|135 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise Practice Exercise|84 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise Practice Exercise|84 Videos

  • MECHANICAL PROPERTIES OF SOLIDS

    AAKASH SERIES|Exercise EXERCISE - 3|26 Videos

  • MOTION IN A STRAIGHT LINE

    AAKASH SERIES|Exercise Questions for Descriptive Answers|7 Videos

Similar Questions

Explore conceptually related problems

If |bar(a)| = 13, |bar(b)| = 5, and bar(a).bar(b) = 60 , then find |bar(a) xx bar(b)| .

If |bar(a)+bar(b)| = |bar(a)-bar(b)| then find the angle between bar(a) and bar(b) .

If |bar(a)|=2, |bar(b)|=3, (bar(a), bar(b))= pi//6 , then find (bar(a) xx bar(b))^(2)

If bar(a) = 2bar(i) - bar(j) + bar(k), and bar(b) = bar(i) - 3bar(j) - 5bar(k) then find |bar(a) xx bar(b)| .

If |bar(a) xx bar(b)|= bar(a).bar(b) , then find the angle between the vectors bar(a) and bar(b) .

Ig |bar(a)| = 11 ,|bar(b)| = 23,|bar(a)-bar(b)| = 30 then find the angle between the vectors bar(a),bar(b) and also find |bar(a)+bar(b)| .

If bar(a) = bar(i) - bar(j)-bar(k), bar(b) = 2bar(i) - 3bar(j) + bar(k) then find the projection vector of bar(b) on bar(a) and its magnitude.

if bar(a) + bar(b) + bar(c ) = bar(0), |bar(a)| = 3, |bar(b)| = 5, |bar(c )| = 7 then find angle between bar(a) , bar(b) .

AAKASH SERIES-MOTION IN A PLANE -Exercise -I
  1. If vec(C) = vec(A) + vec(B) then

    Text Solution

    |

  2. It is found that |A + B| = |A|. This necessarily implies.

    Text Solution

    |

  3. For two vectors A and B, |bar(A) + bar(B)| = |bar(A) - bar(B)| is alwa...

    Text Solution

    |

  4. Let the angle between two nonzero vectors vec(A) and vec(B) be 120^(@)...

    Text Solution

    |

  5. Set the following vectors in the increasing order of their magnitude. ...

    Text Solution

    |

  6. Arrange the vectors subtractions so that their magnitudes are in decre...

    Text Solution

    |

  7. The minimum number of forces of equal magnitude in a plane that can ke...

    Text Solution

    |

  8. The minimum number of unequal forces in a plane that can keep a partic...

    Text Solution

    |

  9. The minimum number of non coplanar forces that can keep a particle in ...

    Text Solution

    |

  10. A motor car is going due north at a speed of 50 km/h. It makes a 90^(@...

    Text Solution

    |

  11. Which of the following four statements is false ?

    Text Solution

    |

  12. In a two dimensional motion, instantaneous speed v(0) is a positive co...

    Text Solution

    |

  13. In a two dimensional motion, instantaneous speed v(0) is a positive co...

    Text Solution

    |

  14. Three different objects of masses m(1), m(2) and m(3) are allowed to f...

    Text Solution

    |

  15. A train is moving due east and a car is moving due north with equal sp...

    Text Solution

    |

  16. A bus moves over a straight level road with a constant acceleration a....

    Text Solution

    |

  17. A particle P moves with speed .v. along AB and BC, sides of a square A...

    Text Solution

    |

  18. If A and B persons are moving with V(A) and V(B) velocities directions...

    Text Solution

    |

  19. Wind is blowing to east along two parallel railway tracks. Two trains ...

    Text Solution

    |

  20. A boat moves relative to water with a velcity which is .n. times the r...

    Text Solution

    |