Home
Class 9
PHYSICS
Can kinetic energy be negative? Why?...

Can kinetic energy be negative? Why?

Text Solution

Verified by Experts

Kinetic energy cannot be negative.
`E_(k)=(1)/(2)mv^(2)`. The mass (m) of an object cannot be negative.
The velocity of an object can be negative. But the square of velocity `(v^(2))` cannot be negative.
As mass and the square of velocity can never be negative, the kinetic energy of an object cannot be negative.
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise QUESTION & ANSWER (GIVE SCIENTIFIC REASONS FOR THE FOLLOWING STATEMENTS :)|12 Videos
  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise QUESTION & ANSWER (MATCH THE FOLLOWING PROPERLY)|4 Videos
  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise QUESTION & ANSWER (STATE WHETHER THE FOLLOWING STATEMENTS ARE TRUE OR FALSE)|24 Videos
  • SOUND

    KUMAR PRAKASHAN|Exercise QUESTIONS AND ANSWERS (Additional numericals for practice)|16 Videos

Similar Questions

Explore conceptually related problems

Kinetic energy can be negative.

Define kinetic energy

Can kinetic energy of a body by negative ? Potential energy be negative ?

Speed of moving object can never be negative. Why ?

A sample of an ideal gas escapes into an evacuated container, there is no change in the kinetic energy of the gas. Why?

A ball is thrown vertically upwards with a velocity v and an initial kinetic energy E . When half way to the top of its flight, it can have velocity and kinetic energy respectively of :

In non-elastic collision, both momentum and kinetic energy are conserved.

Which one among kinetic energy, potential energy and mechanical energy cannot be negative?

KUMAR PRAKASHAN-WORK AND ENERGY -QUESTION & ANSWER (ANSWER THE FOLLOWING QUESTIONS IN SHORT :)
  1. Write a suitable reason for heating up of a metal when hit by a fast m...

    Text Solution

    |

  2. The figure show a simple pendulum consisting a bob of mass 100 g. Init...

    Text Solution

    |

  3. Certain force acting on a 20 kg mass changes its velocity from 5ms^(-1...

    Text Solution

    |

  4. An object of mass 16 kg has 3200 J of kinetic energy. What will be its...

    Text Solution

    |

  5. Find the momentum of a body of mass 100 g having kinetic energy 500 J.

    Text Solution

    |

  6. An object of mass, m is moving with a constant velocity v. How much wo...

    Text Solution

    |

  7. Calculate the work required to be done to stop a car of 1500 kg moving...

    Text Solution

    |

  8. Can kinetic energy be negative? Why?

    Text Solution

    |

  9. Give any four illustrations of the kinetic energy.

    Text Solution

    |

  10. An object of mass 40kg is raised to a height of 5 m above the ground. ...

    Text Solution

    |

  11. What are the various energy trans-formations that occur when you are ...

    Text Solution

    |

  12. Does the transfer of energy take place when you push a huge rock with ...

    Text Solution

    |

  13. The potential energy of a freely falling object decreases progressivel...

    Text Solution

    |

  14. A battery lights a bulb. Describe the energy changes involved in the p...

    Text Solution

    |

  15. A person holds a bundle of hay over his head for 30 minutes and gets t...

    Text Solution

    |

  16. An electric heater is rated 1500 W. How much energy does it use in 10 ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. Find the energy in kWh consumed in 10 hour by 4 devices of power 500 W...

    Text Solution

    |

  20. A certain household has consumed 250 units of energy during a month. H...

    Text Solution

    |