Home
Class 10
PHYSICS
A coolie is pushing a box weighing 1500 ...

A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

ICSE-SAMPLE PAPER 2013-SECTION-II
  1. A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m l...

    Text Solution

    |

  2. A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m l...

    Text Solution

    |

  3. A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m l...

    Text Solution

    |

  4. A block and tackle system of pulleys has velocity ratio 4. Draw a ne...

    Text Solution

    |

  5. A block and tackle system of pulleys has a velocity ratio 4. What is...

    Text Solution

    |

  6. Name the radiations : that are used for photography at night.

    Text Solution

    |

  7. Name the radiations : used for detection of fracture in bones.

    Text Solution

    |

  8. Name the radiations : whose wavelength range is from 100 Å to 4000 Å...

    Text Solution

    |

  9. Define the term refractive index of a medium. Can it be less than 1 ?

    Text Solution

    |

  10. A coin placed at the bottom of a beaker appears to be raised by 4.0 cm...

    Text Solution

    |

  11. An object AB is placed between 2F(1)andF(1) on the principal axis of a...

    Text Solution

    |

  12. What is the principle on which SONAR is based ?

    Text Solution

    |

  13. An observer stands at a certain distance away from a cliff and produce...

    Text Solution

    |

  14. A vibrating tuning fork is placed over the mouth of a burette filled w...

    Text Solution

    |

  15. A vibrating tuning fork is placed over the mouth of a burette filled w...

    Text Solution

    |

  16. What is meant by the terms (1) amplitude (2) frequency, of a wave ?

    Text Solution

    |

  17. Explain, why stringed musical instruments, like the guitar, are provid...

    Text Solution

    |

  18. It is observed that the temperature of the surroundings starts falling...

    Text Solution

    |

  19. How is the heat capacity of the body related to its specific heat capa...

    Text Solution

    |

  20. Why does a bottle of soft drink cool faster when surrounded by ice cub...

    Text Solution

    |