Home
Class 11
PHYSICS
Two equal forces have their resultant eq...

Two equal forces have their resultant equal to either. At what angle are they inclined ?

Text Solution

Verified by Experts

Here, ` A = B = R=x (say)`
As, ` R = sqrt (A^2 + B^2 + 2 AB cos theta` )`
:. ` x^2=x^2 +x^2 + 2 xx cos theta`
or ` 1=1 + 1 =2 cos theta`
or ` cos theta =- 1/2 + 2 cos 120^@`
or ` theta = 120^@ s` .
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    PRADEEP|Exercise 4 Problems for practice|45 Videos

  • KINEMATICS

    PRADEEP|Exercise 1 Multiple choice|10 Videos

  • KINEMATICS

    PRADEEP|Exercise 2 Problems for practice|36 Videos

  • GRAVIATION

    PRADEEP|Exercise Assertion-Reason Type Questions|19 Videos

  • LAWS OF MOTION

    PRADEEP|Exercise Assertion- Reason Type Questions|17 Videos

Similar Questions

Explore conceptually related problems

Two equal vectors have a resultant equal to either. The angle between them is

Two equal vectors have a resultant equal to either of them. The between them is

Two equal vector have a resultant equal to either of them, then the angle between them will be:

Two vectors of equal magnitudes have a resultant equle to either of them, than the angel between them will be

Two vectors, equal in magnitude, have their resultant equal in magnitude of the either. The angle between the two vectors is _____.

Two vectors, both equal in magnitude, have their resultant equal in magnitude of the either. Find the angle between the two vectors.

If two vectors are equal and their resultant is also equal to one of them, then the angle between the two vectors is

Two forces F_(1) and F_(2) are acting on a body. One force is double that of the other force and the resultant is equal to the greater force. Then the angle between the two forces is

Two force F_(1)" and "F_(2) are acting on a body. One force is double that of the other force and the resultant is equal to the greater force. Then the angle between the two forces is :-

Knowledge Check

  • Two equal vectors have a resultant equal to either of them. The between them is

    A
    `60^(@)`
    B
    `90^(@)`
    C
    `100^(@)`
    D
    `120^(@)`

  • Two equal vector have a resultant equal to either of them, then the angle between them will be:

    A
    `110^(@)`
    B
    `120^(@)`
    C
    `60^(@)`
    D
    `150^(@)`

  • Two vectors of equal magnitudes have a resultant equle to either of them, than the angel between them will be

    A
    `30^@`
    B
    `120^@`
    C
    `60^@`
    D
    `150^@`
    • PRADEEP-KINEMATICS-3 Problems for practice
    1. Two equal forces have their resultant equal to either. At what angle a...

      Text Solution

      |

    2. A body is simultanceously given two velocities : one 12 ms^(-1) due E...

      Text Solution

      |

    3. A mn walds 20 m north of east and walds 20 m. Calculate the net disp...

      Text Solution

      |

    4. two persons are raising a load pulling at an angle of each other. If t...

      Text Solution

      |

    5. Two forces (2p) and (4p) newton act on a particle. If the first force ...

      Text Solution

      |

    6. The greatest and the least resultant of two forces acting at a point a...

      Text Solution

      |

    7. Two eual forces act at a point. The squard of their resultant is 3 t...

      Text Solution

      |

    8. AT what angle two forces (P +Q) and (P-Q) act so that resultant is (i...

      Text Solution

      |

    9. A particle has the following displacements in succession (i) 12 m tow...

      Text Solution

      |

    10. Tow boys raising a buket pull it at an angle theta to each ogher. If ...

      Text Solution

      |

    11. Two forces, while acting on particle in opposite directions,have the r...

      Text Solution

      |

    12. Two forces equal to (F) and ( 3 F) newton act on a particle . If the f...

      Text Solution

      |

    13. A motor cyclist is riding North in still air at 20 km H^(-1) . If the ...

      Text Solution

      |

    14. Given that vec(A)+vec(B)+vec(C )=vec(0). Out of three vectors, two are...

      Text Solution

      |

    15. Two buses start from a bus stand with velocitues 10 km h^(-1) and 30...

      Text Solution

      |

    16. A bob weighing 0.06 kg hangs vertcally at the end of a sting 0.30 m ...

      Text Solution

      |

    17. A ship is streaming due West at 12 ms"^(-10. A boy runs across the de...

      Text Solution

      |

    18. A river 800 m wide flows at the rate of 6 km h^(1) in still water, w...

      Text Solution

      |

    19. A boat man can rown with a speed of 10 km h^(-1) in still water. If ...

      Text Solution

      |

    20. A river is flowing steradily with a speed 5 km h^(-1) . A boat man ca...

      Text Solution

      |