Home
Class 9
PHYSICS
In which of the following examples, work...

In which of the following examples, work done is negative?

A

Work done by the force of gravity on a movemet aeroplane

B

Work done by the force of gravity on a thrown upwards.

C

Work done by the force of gravity on a freesh falling object

D

Work done by the force of gravity on a satellite revolving around the earth.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    MODERN PUBLICATION|Exercise EXERCISE|191 Videos

  • SOUND

    MODERN PUBLICATION|Exercise EXERCISE|137 Videos

Similar Questions

Explore conceptually related problems

Which of the following is an example of condominance?

Which of the following statements are true? Zero is a negative integer.

Which of the following will have the most negative electron gain enthalpy and which the east negative? (P, S, CI, F). Explain your answer.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:- work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:- work done by friction on a body sliding down an inclined plane.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:- work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:- work done by the resistive force of air on a vibrating pendulum in bringing it to rest.

In each of the following a force,F is acting on an object of mass,m. The direction of displacement is from west to east shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative,positive or zero.

MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. If mass is doubled and velocity is halved then new kinetic energy is

    Text Solution

    |

  2. When the force retards the motion of the body, the work done is :

    Text Solution

    |

  3. In which of the following examples, work done is negative?

    Text Solution

    |

  4. In which of the following applications is work is not done?

    Text Solution

    |

  5. For a force to do maximum work, what should be the angle between force...

    Text Solution

    |

  6. State the SI unit of potential energy.

    Text Solution

    |

  7. What is the commercial unit of electical energy? Represent it in terms...

    Text Solution

    |

  8. A boy throws a rubber ball vertically upwards. What kind of work is do...

    Text Solution

    |

  9. A boy throws a rubber ball vertically upwards. What kind of work is do...

    Text Solution

    |

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

    Text Solution

    |

  11. Express kilowatt hour in terms of joules.

    Text Solution

    |

  12. Two children A and B each weigh 20 kg climb a rope up a height of 10 m...

    Text Solution

    |

  13. Two children A and B each weigh 20 kg climb a rope up a height of 10 m...

    Text Solution

    |

  14. In a house 3 bulb of 25 W. Each are used for 5 hours a day. Calculate ...

    Text Solution

    |

  15. State the law of conservation of energy. Show that the energy of a fre...

    Text Solution

    |

  16. The work done on a object does not depend upon the

    Text Solution

    |

  17. In case of negative work the angle between the force and displacement ...

    Text Solution

    |

  18. Water stored in a dam possesses

    Text Solution

    |

  19. Which one of the following is not the unit of energy?

    Text Solution

    |

  20. Two boys A and B do equal work. They will have equal power if

    Text Solution

    |