Home
Class 11
PHYSICS
You lift a heavy book from the floor of ...

You lift a heavy book from the floor of the room and keep it in the book shelf having a height 2m. In this process you take 5 seconds. The work done by you will depend upon:

A

mass of the book and time taken

B

weight of the book and height of the book-shelf

C

height of the book-shelf and time taken

D

mass of the book, height of the book-shelf and time taken

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    PREMIERS PUBLISHERS|Exercise VERY SHORT ANSWER QUESTIONS|34 Videos

  • WORK, ENERGY AND POWER

    PREMIERS PUBLISHERS|Exercise CONCEPTUAL QUESTIONS|34 Videos

  • WAVES

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT & QUESTIONS ANSWERS ( NUMERICAL PROBLEMS. )|48 Videos

Similar Questions

Explore conceptually related problems

IF you have lifted a suitcase and kept it on a table, then the work done by you will depend on

You lift a suitcase from the floor and keep it on a table. The work done by you on the suitcae does not depend on

If an object of mass 2 kg is thrown up from the ground reaches a height of 5 m and falls back to the Earth (neglect the air resistance) Calculate (a) The work done by gravity when the object reaches 5 m height (b) The work done by gravity when the object comes back to Earth (c) Total work done by gravity both in upward and downward motion and mention the physical significance of the result

Lift an object up from the ground. Work done by the force exerted by you on the object moves it in upward direction. Thus the force applied is in the direction of displacement. However there exists a force of gravitation on the object at the same time • Which one of these forces is doing positive work? • Which one is doing negative work? • Give reasons

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite ? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^(24) kg." radius" = 6400 km .

Read the following paragraph carefully and answer the following question . If the heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy . The change in temperature continues till the temperatures of both the the object attain the same value . In the process, the cold object gains heat energy and the hot object lose heat energy . If the system of both the object is isolated from the environment by keeping it inside a heat resistance box ( meaning that the energy exchange takes place between the two object only), then no energy can flow from inside the box or come into the box. How will you state the principle briefly ?

PREMIERS PUBLISHERS-WORK, ENERGY AND POWER -MULTIPLE CHOICE QUESTIONS (OTHER IMPORTANT QUESTIONS & ANSWERS)
  1. A body projected electrically from the earth reaches a height equal to...

    Text Solution

    |

  2. A particle is acted upon by a force of constant magnitude which is alw...

    Text Solution

    |

  3. You lift a heavy book from the floor of the room and keep it in the bo...

    Text Solution

    |

  4. A man starts walking from a point on the surface of earth (assumed smo...

    Text Solution

    |

  5. Which one of the following is not a conservative force?

    Text Solution

    |

  6. Choose the correct option:

    Text Solution

    |

  7. In the following question, a statement of Assertion is followed by a s...

    Text Solution

    |

  8. The bob of a pendulum of length 2 m lies at P. When it reaches Q it lo...

    Text Solution

    |

  9. Match the parameters given in column I with the expressions given in c...

    Text Solution

    |

  10. A body of mass 1kg begins to more under the action of a time dependent...

    Text Solution

    |

  11. The body moves under the action of constant force along a straight lin...

    Text Solution

    |

  12. Which one of the following statement is an incorrect statement?

    Text Solution

    |

  13. The spring of the watch when wound possesses………………..energy.

    Text Solution

    |

  14. A light and heavy body have equal momentum, which has greater K.E?

    Text Solution

    |

  15. A light body and a heavy body have the same kinetic energy. Which one ...

    Text Solution

    |

  16. Same retarding force is applied to stop the train in certain distance....

    Text Solution

    |

  17. Law of conservation of linear momentum is applicable even in those ca...

    Text Solution

    |

  18. In the following question, a statement of Assertion is followed by a s...

    Text Solution

    |

  19. If the force and the displacement are in the same direction, then the ...

    Text Solution

    |

  20. If the force and the displacement are at an angle of 180^(@), then wor...

    Text Solution

    |