Home
Class 11
PHYSICS
Two paricle A and B initially at rest, m...

Two paricle A and B initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2V, the speed of the centre of mass of the system is

A

0

B

v

C

1.5 v

D

3 v

Text Solution

Verified by Experts

The correct Answer is:
A
(a) As no external force acts on system, so centre of mass will not move.
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL DYNAMICS

    A2Z|Exercise Moment Of Inertia|39 Videos

  • ROTATIONAL DYNAMICS

    A2Z|Exercise Rotational Kinematics|19 Videos

  • ROTATIONAL DYNAMICS

    A2Z|Exercise Chapter Test|29 Videos

  • PROPERTIES OF MATTER

    A2Z|Exercise Chapter Test|29 Videos

  • THERMAL PROPERTIES OF MATTER

    A2Z|Exercise Chapter Test|30 Videos

Similar Questions

Explore conceptually related problems

Two particles A and B initially at rest, move towards each other by mutual force of attraction. At the instant when the speed of A is n and the speed of B is 3n , the speed of the centre of mass of the system is

Two particles A and B initially at rest, move towards each other, under mutual force of attraction. At an instance when the speed of A is v and speed of B is 2v , the speed of centre of mass ( CM ) is

Two partticles A and B intially at rest move towards each other under a mutual force of attraction. The instant at which velocity of A is 4v and velocity of B is 2v , the velocity of centre of mass of the system at that instant will be

Two particle which are initially at rest move towards each other under the action of their internal attraction. If their speeds are v and 2 v at any instant, then the speed of centre of mass of the system will be

Two particles A and B with particle A having mass m, are moving towards each other under their mutual force of attraction. If their speeds at certain instant are v and 2v respectively, then find the K.E. of the system.

10 Two particles of masses m_(1) and m_(2) initially at rest start moving towards each other under their mutual force of attraction. The speed of the centre of mass at any time t, when they are at a distance r apart, is

Two particles of mass m_(1) and m_(2) are approaching towards each other under their mutual gravitational field. If the speed of the particle is v, the speed of the center of mass of the system is equal to :

A2Z-ROTATIONAL DYNAMICS-Displacement , Velocity And Acceleration Of Centre Of Mass
  1. A 10 kg boy standing in a 40 kg boat floating on water is 20 m away fr...

    Text Solution

    |

  2. A wedge Q of mass M is placed on a horizontal frictionless surface AB ...

    Text Solution

    |

  3. A man weighing 80 kg is standing on a trolley weighing 320 kg. The tro...

    Text Solution

    |

  4. In a gravity free space, man of mass M standing at a height h above th...

    Text Solution

    |

  5. Two paricle A and B initially at rest, move towards each other under m...

    Text Solution

    |

  6. Three balls of different masses are thrown at different instants up ag...

    Text Solution

    |

  7. A particle of mass 200 g is dropped from a height of 50 m and another ...

    Text Solution

    |

  8. In the above problem the velocity of the centre of mass after 1 sec wi...

    Text Solution

    |

  9. Two masses m1 = 1 kg and m2 = 2 kg are connected by a light inextensib...

    Text Solution

    |

  10. Two bodies of masses 1 kg and 2 kg are moving in two perpendicular dir...

    Text Solution

    |

  11. If the system is released, then the acceleration of the centre of mass...

    Text Solution

    |

  12. Two particles of equal mass have velocities vec v1 = 2 hat i= m//s^-1 ...

    Text Solution

    |

  13. Two particles are shown in figure. At t = 0 a constant force F = 6 N s...

    Text Solution

    |

  14. Figure shows two blocks of masses 5 kg and 2 kg placed on a frictionle...

    Text Solution

    |

  15. In a system of particles 8 kg mass is subjected to a force of 16 N alo...

    Text Solution

    |

  16. At t = 0, the positions and velocities of two particles are as shown i...

    Text Solution

    |

  17. Two blocks of masses 10 kg and 4 kg are connected by a spring of negli...

    Text Solution

    |

  18. A wagon of 200 kg is moving on a smooth track with velocity of 2 m//se...

    Text Solution

    |

  19. The velocities of two particles A and B of same mass are vec VA = a ha...

    Text Solution

    |

  20. Two uniform non conducting balls A and B have identical size having ra...

    Text Solution

    |