Home
Class 9
PHYSICS
What is the kinetic energy of an object ...

What is the kinetic energy of an object ?

Text Solution

Verified by Experts

The energy possessed by a body by the virtue of its motion is called kinetic energy. Every moving object possesses kinetic energy. A body uses kinetic energy to do work. Kinetic energy of hammer is used in driving a nail into a log of wood, kinetic energy of air is used to run wind mills, etc.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The more is the speed, the more is the kinetic energy of the object in motion.

If the kinetic energy of the molecules in 5 litre of helium at 2 atm is (E ) . What is the kinetic energy of molecules in 15 litre of oxygen at 3 atm in terms of (E ) ?

The total energy of the electron in the first excited state of hydrogen is -3.4 eV . What is the kinetic energy of the electron in this state?

An object of mass m moves with constant speed in a circular path of radius r under the action of a force of constant magnitude F. the kinetic energy of object is

A stationary thorium nucleus (A=200 , Z=90) emits an alpha particle with kinetic energy E_(alpha) . What is the kinetic energy of the recoiling nucleus

What is the kinetic energy of a 45 kg rickshaw moving at 10 m/s?

A satellite is moving with a constant speed 'V' in a circular orbit about the earth. An object of mass 'm' is ejected from the satellite such that it just escapes form the gravitational pull of the earth. At the tme of its ejection, the kinetic energy of the object is

To required kinetic energy of an object of mass m , so that it may escape, will be

A small steel sphere of mass m and radius r rolls without slipping on the fiictionless surface of a large hemisphere of radius R {R gt gt r) whose axis of symmetry is vertical. It starts at the top from the rest, (a) What is the kinetic energy at the bottom ? (b) What fraction is the rotational kinetic energy of the total kinetic energy ? (c) What fraction is the rotational kinetic energy of the total kinetic energy? (d) What fraction is the translational kinetic energy of the total kinetic energy?

NCERT ENGLISH-WORK AND ENERGY-Exercise
  1. An electric heater is rated 1500W. How much energy does it use in 10 ...

    Text Solution

    |

  2. Illustrate the law of conservation of energy by discussing the energy ...

    Text Solution

    |

  3. An object of mass m is moving with a constant velocity upsilon How muc...

    Text Solution

    |

  4. calculate the work required to be done to stop a car of 1500 kg moving...

    Text Solution

    |

  5. In each of the following, a force, F is acting on an object of mass, m...

    Text Solution

    |

  6. Soni says that the acceleration in an object could be zero even when s...

    Text Solution

    |

  7. find the energy in kWh consumed in 10 hours by four devices of power 5...

    Text Solution

    |

  8. A freely falling object eventually stops on reaching the ground. What ...

    Text Solution

    |

  9. A force of 7N acts on an object. The displacement is, say 8m, in the d...

    Text Solution

    |

  10. When do we say that work is done ?

    Text Solution

    |

  11. Write an expression for the work done when a force is acting on an obj...

    Text Solution

    |

  12. Define 1 J of work.

    Text Solution

    |

  13. A pair of bullocks exerts a force of 140 N on a plough. The field bei...

    Text Solution

    |

  14. What is the kinetic energy of an object ?

    Text Solution

    |

  15. Write an expression for kinetic energy of an object.

    Text Solution

    |

  16. The kinetic energy of an object of mass m moving with a velocity of 5 ...

    Text Solution

    |

  17. What is power ?

    Text Solution

    |

  18. Define 1 W of power.

    Text Solution

    |

  19. A lamp consumes 1000 J of electrical energy is 10 s. What is its power...

    Text Solution

    |

  20. Define average power.

    Text Solution

    |