Home
Class 11
PHYSICS
A ball in thrown up. The magnitude of it...

A ball in thrown up. The magnitude of its momentum first decreases and then increases. Does this violate the conservation of momentum principle.

Text Solution

Verified by Experts

The momentum of a body is conserved only when there is no external force acting on the body. In the case under discussion. Force of gravity is acting on the body as an external force. So the change in momentum of the body does not signify any violation of the law of conservation of momentum.
Promotional Banner

Topper's Solved these Questions

  • NEWTON'S LAWS OF MOTION

    CHHAYA PUBLICATION|Exercise EXERCISE (MULTIPLE CHOICE QUESTIONS)|19 Videos

  • NEWTON'S LAWS OF MOTION

    CHHAYA PUBLICATION|Exercise VERY SHORT ANSWER TYPE QUESTIONS|15 Videos

  • NEWTON'S LAWS OF MOTION

    CHHAYA PUBLICATION|Exercise SECTION RELATED QUESTION|10 Videos

  • NATURE OF VIBRATION

    CHHAYA PUBLICATION|Exercise EXERCISE (CBSE SCANNER)|2 Videos

  • NEWTONIAN GRAVITATION AND PLANETARY MOTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|19 Videos

Similar Questions

Explore conceptually related problems

State the principle of conservation of angular momentum.

State the principle of conservation of angular momentum.

Does the principle of multiplication of thrust violate the principle of conservation of energy? Discuss.

The increase in momentum of a body is 100% . What will be the increases in its kinetic energy ?

The current through an ac circuit first increases and then decreases as its frequency is increased. Which among the followings are most likely combination of the circuit?

A particle of mass m is projected with a velocity v, making an angle of 45^(@) with the horizontal. The magnitude of the angular momentum of the projectile about the point of projection, when it is at its maximum height h, is

Einstein established the idea of photons on the basis of Planck's quantum theory. According to his idea, the light of frequency f or wavelength lamda is infact a stream of photons. The rest mass of each photon is zero and velocity is equal to the velocity of light (c) = 3 xx 10^(8) m.s^(-1) . Energy, E = hf, where h = Planck's constant = 6.625 xx 10^(-34)J.s . Each photon has a momentum p = (hf)/(c) , although its rest mass is zero. The number of photons increase when the intensity of incident light increases and vice-versa. On the other hand, according to de Broglie any stream of moving particles may be represented by progressive waves. The wavelength of the wave (de Broglie wavelength) is lamda = (h)/(p) , where p is the momentum of the particle. When a particle having charge e is accelerated with a potential difference of V, the kinetic energy gained by the particle is K= eV. Thus as the applied potential difference is increased, the kinetic energy of the particle and hence the momentum increase resulting in a decrease in the de Broglie wavelength. Given, charge of electron, e = 1.6 xx 10^(-19)C and mass = 9.1 xx 10^(-31) kg . The number of photons emitted per second from a light source of power 40 W and wavelength 5893 Å

CHHAYA PUBLICATION-NEWTON'S LAWS OF MOTION-HIGHER ORDER THINKING SKILL (HOYS) QUESTIONS
  1. Is it possible, for a person sitting inside a car at rest, to make the...

    Text Solution

    |

  2. A meteorite burns in air. Is the momentum of the meteorite conserved?

    Text Solution

    |

  3. A man of mass m is standing on a rope-ladder attached to and kept vert...

    Text Solution

    |

  4. A ball in thrown up. The magnitude of its momentum first decreases and...

    Text Solution

    |

  5. In a game of tug-of-war, if both the parties exert a force of T dyn fr...

    Text Solution

    |

  6. Two persons pull a rope by its two ends, exerting equal but opposite f...

    Text Solution

    |

  7. A uniform rope of length L rests on a smooth plane. One end of the rop...

    Text Solution

    |

  8. A boat is floating in still water. A man walks from one end of the boa...

    Text Solution

    |

  9. A jet plane usually fllies at a considerable height but a propeller pl...

    Text Solution

    |

  10. Which principle of conservation can explain the flight of a rocket?

    Text Solution

    |

  11. Two persons are facing each other on two boats floating on still water...

    Text Solution

    |

  12. A block of mass m is suspended from the ceilling using a string C. Ano...

    Text Solution

    |

  13. Rocket is the only means of travel in space - explain.

    Text Solution

    |

  14. Two balls of different masses have the same volume. If the air resista...

    Text Solution

    |

  15. A balloon of mass M, carrying some is descending with an acceleration ...

    Text Solution

    |

  16. Two forces, F(1) and F(1) are applied at the two ends of a rope of len...

    Text Solution

    |

  17. If you stand on the floor it exerts an upward reaction on you. Then wh...

    Text Solution

    |

  18. A body of weight W(1) is suspended from from the ceiling of a room by ...

    Text Solution

    |

  19. A ball of mass m is suspended by a light thread attached to the hook o...

    Text Solution

    |

  20. A body of mass 1 kg initially at rest explodes and breaks into three f...

    Text Solution

    |