Home
Class 11
PHYSICS
The kinetic energy of a moving body is g...

The kinetic energy of a moving body is given by `k = 2v^(2), k` being in joules and `v` in `m//s`. It's momentum when travelling with a velocity of `2m//s` will be (in `kg ms^(-1)`)

A

16

B

4

C

8

D

2

Text Solution

Verified by Experts

The correct Answer is:
`(3)`
`K = 2v^(2) = 1/2 mv^(2) and p =mv`
Promotional Banner

Topper's Solved these Questions

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE -II (H.W)|75 Videos

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE -III|54 Videos

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE -1 (H.W)|60 Videos

  • WAVES

    NARAYNA|Exercise Exercise-IV|56 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level-VI (Integer)|12 Videos

Similar Questions

Explore conceptually related problems

The momentum of a person weighing 60kg walking with a velocity of 2m//s is

The kinetic energy of a body ia 4 joule and its moment of inertia is 2" kg m"^(2) . Angular momentum is

What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s ?

The velocity of a particle moving on the x-axis is given by v=x^(2)+x , where x is in m and v in m/s. What is its position (in m) when its acceleration is 30m//s^(2) .

The rotational kinetic energy of a rigid body of moment of inertia 5 kg-m^(2) is 10 joules. The angular momentum about the axis of rotation would be -

The velocity of a body moving in a straight line is given by v=(3x^(2)+x)m//s . Find acceleration at x=2m .

A particle starts from rest and moves along a straight line such that its acceleration a as a function of velocity v is given as a=(5)/(3v+2) where a is in m/s^(2) and v is in m/s .The distance travelled by the particle till it attains velocity of 10m/s is

The kinetic energy of a body rotating at 300 revolutions per minute is 62.8 J. Its angular momentum (in kg m^(2)s^(-2) ) is approximately

NARAYNA-WORK , ENERGY & POWER -EXERCISE -II (C.W)
  1. Two spheres of same material are moving with kinetic energies in the r...

    Text Solution

    |

  2. If the mass of a moving body decreased by one third of its initial mas...

    Text Solution

    |

  3. The kinetic energy of a moving body is given by k = 2v^(2), k being in...

    Text Solution

    |

  4. The kinetic energy (KE) versus time graph for a particle moving along ...

    Text Solution

    |

  5. A uniform chain of length 2 m is kept on a table such that a length of...

    Text Solution

    |

  6. The potential energy of a body mass m is U=ax+by the magnitude of acce...

    Text Solution

    |

  7. A block of mass M is hanging over a smooth and light pulley through a ...

    Text Solution

    |

  8. The kinetic energy K of a particle moving along x - axis varies its po...

    Text Solution

    |

  9. Figure given below shows the plot of the conservative force F, in a un...

    Text Solution

    |

  10. Match the following {: ( "Column I", " Column II"),(" (A) Example o...

    Text Solution

    |

  11. A massless spring with a force constant K = 40N//m hangs vertically fr...

    Text Solution

    |

  12. A block of mass m moving at a speed v compresses as spring thrugh a di...

    Text Solution

    |

  13. A bead of mass 1/2 kg starts from rest from A to move in a vertical pl...

    Text Solution

    |

  14. An outfielder throws a cricket ball with an initial kinetic energy of ...

    Text Solution

    |

  15. Velocity-time graph of a particle of mass (2 kg) moving in a straight ...

    Text Solution

    |

  16. A block of mass 1 kg slides down a vertical curved track that is one q...

    Text Solution

    |

  17. A force F = Ay^(2)+By+C acts on a body at rest in the Y-direction. The...

    Text Solution

    |

  18. A block of mass m=1kg moving on a horizontal surface with speed v(i)=2...

    Text Solution

    |

  19. In the fig. The potential energy U of a particle plotted against its p...

    Text Solution

    |

  20. If F = 2x^(2) - 3x -2, then choose correct option:-

    Text Solution

    |