Home
Class 12
PHYSICS
If |vecA+vecB|=|vecA|+|vecB|, then angle...

If `|vecA+vecB|=|vecA|+|vecB|`, then angle between `vecA` and `vecB` will be

A

`90^@`

B

`120^@`

C

`0^@`

D

`60^@`

Text Solution

Verified by Experts

The correct Answer is:
B
`|vecA+vecB|^2=A^2+B^2+2AB cos theta`
`rArr A^2=A^2+A^2+2A^2 cos theta`
`rArr cos theta =-1/2 rArr theta=120^@`
Promotional Banner

Topper's Solved these Questions

  • NEET

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise PHYSICS|157 Videos

  • NEET

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise QUESTION|95 Videos

  • MOTION IN TWO AND THREE DIMENSION

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|47 Videos

  • NEET 2020

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|45 Videos

Similar Questions

Explore conceptually related problems

If |vecA-vecB|=|vecA|=|vecB| , the angle between vecA and vecB is

if| vecAxxvecB|=|vecA.vecB| , then angle between vecA and vecB will be

If |vecA + vecB| = |vecA - vecB| , then the angle between vecA and vecB will be

If |vecA xx vecB| = |vecA*vecB| , then the angle between vecA and vecB will be :

If |vecA+vecB|=|vecA|=|vecB| then angle between A and B will be

If vecA*vecB=|vecAxxvecB| . Then angle between vecA and vecB is

If vecA.vecB = |vecA xx vecB| , find angle between vecA and vecB .

Statement-1:If , |vec A+vec B| =|vecA-vecB| then angle between vecA and vecB is 90^(@) Statement-2 :vecA+vecB=vecB+vecA

If |veca+vecb|^2=|veca|^2+|vecb|^2 then angle between veca and vecb is

The vector vecA and vecB are such that |vecA+vecB|=|vecA-vecB| . The angle between vectors vecA and vecB is -

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-NEET-MCQ
  1. If |vecA+vecB|=|vecA|+|vecB|, then angle between vecA and vecB will be

    Text Solution

    |

  2. The damping force on an oscillator is directly proportional to the vel...

    Text Solution

    |

  3. The motion of a particle along a straight line is described by equatio...

    Text Solution

    |

  4. The horizontal range and the maximum height of a projectile are equal....

    Text Solution

    |

  5. A particle has initial velocity (2 vec(i)+3 vec(j)) and acceleration (...

    Text Solution

    |

  6. A car of mass 1000kg negotiates a banked curve of radius 90m on a fict...

    Text Solution

    |

  7. A solid cylinder of mass 3 kg is rolling on a horizontal surface with ...

    Text Solution

    |

  8. The potential energy of a particle in a force field is: U = (A)/(r^(...

    Text Solution

    |

  9. Two sphere A and B of masses m(1) and m(2) respectivelly colides. A is...

    Text Solution

    |

  10. Two persons of masses 55 kg and 65 kg respectively are at the opposite...

    Text Solution

    |

  11. ABC is an equilateral triangle with O as its centre vec(F(1)),vec(F(2)...

    Text Solution

    |

  12. When a mass is rotating in a plane about a fixed point, its angular mo...

    Text Solution

    |

  13. A spherical planet far out in space has a mass M(0) and diameter D(0)....

    Text Solution

    |

  14. A geostationary satellite is orbiting the earth at a height of 5R abov...

    Text Solution

    |

  15. The height a which the weight of a body becomes 1//16th its weight on ...

    Text Solution

    |

  16. Two sources of sound placed close to each other are wmitting progressi...

    Text Solution

    |

  17. When a string is divided into three segments of length l1,l2 and l3 th...

    Text Solution

    |

  18. One mole of an ideal gas goes from an initial state A to final state B...

    Text Solution

    |

  19. A thermodynamics system is taken trough the cycle ABCD as shown in fig...

    Text Solution

    |

  20. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm...

    Text Solution

    |

  21. If the radius of a star is R and it acts as a black body, what would b...

    Text Solution

    |