Home
Class 11
PHYSICS
An 8 gm bullet is fired horizontally int...

An `8 gm` bullet is fired horizontally into a `9 kg` block of wood and sticks in it. The block which is free to move, has a velocity of `40 cm//s` after impact. The initial velocity of the bullet is

A

`450 m//s`

B

`450 cm//s`

C

`220 m//s`

D

`220 cm//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`m u = (m + M) v`
Promotional Banner

Topper's Solved these Questions

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level- II (C.W)|68 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level- III (C.W)|50 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise C.U.Q-Key|75 Videos

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE IV|43 Videos

Similar Questions

Explore conceptually related problems

A 15 gm bullet is fired horizontally into a 3 kg block of wood suspended by a string. The bullet sticks in the block, and the impact causes the block to swing 10 cm above the initial level. The velocity of the bullet nearly is (in ms^(-1) )

A bullet of mass 7kg is fired into a block of metal weighing 7kg The block is free to move Caluculte initial velocity of the bullet if the velocity of the block with the bullet in is 0.7m//s .

A 10 gm bullet is fired from a rifle horizontally into a 5 kg block of wood suspended by a string and the bullet gets embedded in the block. The impact causes the block to swing to a height of 2.5 cm above its initial level. The velocity of the bullet is

From a rifle of mass 4kg , a bullet of mass 50kg is fired with an initial velocity of 35m//s . Calculate the initial recoil velocity of the rifle.

A bullet of mass 4.2 gm is moving at certain velocity. If all its kinetic energy liberated is 20 cal, then the initial velocity of the bullet is

A bullet of mass 4 g is fired with a velocity of 600 ms^(-1) into a block of metal weighing 9.996kg . The block is free to move. Calculate the common velocity of the bullet and block after the impact.

A bullet of mass a and velocity b is fired into a large block of mass c. the final velocity of the system is

A block of mass m rests on a rough horizontal surface (Coefficient of friction is µ ). When a bullet of mass m//2 strikes horizontally, and get embedded in it, the block moves a distance d before coming to rest. The initial velocity of the bullet is ksqrt(2mugd), then the value of k is

From a rifle of mass 5kg , a bullet of mass 50g is fired with an initial velocity of 108km//h . Calculate initial recoil velocity of the rifle.

NARAYNA-WORK POWER AND ENERGY-Level- I (C.W)
  1. A 6 kg mass travelling at 2.5 ms^(-1) collides head on with a stationa...

    Text Solution

    |

  2. A body of mass 10 kg moving with a velocity of 5 ms^(-1) hits a body o...

    Text Solution

    |

  3. A block of mass 1 kg moving with a speed of 4 ms^(-1), collides with a...

    Text Solution

    |

  4. A marble going at a speed of 2 ms^(-1) hits another marble of equal m...

    Text Solution

    |

  5. A heavy ball moving with speed v collides with a tiny ball. The collis...

    Text Solution

    |

  6. A 1 kg ball moving at 12 m//s collides head on with a 2g ball moving i...

    Text Solution

    |

  7. A 6 kg mass collides with a body at rest. After the collision, they tr...

    Text Solution

    |

  8. A body of mass m moving at a constant velocity v hits another body of ...

    Text Solution

    |

  9. An 8 gm bullet is fired horizontally into a 9 kg block of wood and sti...

    Text Solution

    |

  10. A block of wood of mass 9.8 kg is suspended by a string. A bullet of m...

    Text Solution

    |

  11. A 15 gm bullet is fired horizontally into a 3 kg block of wood suspend...

    Text Solution

    |

  12. A body of mass 20 gm is moving with a certain velocity. It collides wi...

    Text Solution

    |

  13. A rubber ball drops from a height 'h'. After rebounding twice from the...

    Text Solution

    |

  14. A body dropped freely from a height h onto a horizontal plane, bounces...

    Text Solution

    |

  15. In the above problem, the ratio of times of two consecutive rebounds i...

    Text Solution

    |

  16. In the above problem the ratio of distances travelled in two consecuti...

    Text Solution

    |

  17. A ball is dropped onto a horizontal floor. Reaches a height of 144 cm ...

    Text Solution

    |

  18. A ball is dropped onto a horizontal floor. Reaches a height of 144 cm ...

    Text Solution

    |

  19. A ball is dropped from height 'H' onto a horizontal surface. If the co...

    Text Solution

    |

  20. A stationary body explodes into two fragments of masses m(1) and m(2)....

    Text Solution

    |