Home
Class 11
PHYSICS
A box is lifted vertically by 6m in 3 s...

A box is lifted vertically by 6m in 3 s.
(i) If the box is lifted to the same height in a zig-zag way what would be the change in the work done ?

Text Solution

Verified by Experts

Gravitational force is a conservative force . Hence work done to lift a body to the same height will be the same whatever may the nature of the path be.
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise EXERCISE (Multiple Choice Questions)|33 Videos
  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise EXERCISE (Very short Answer Type Questions)|30 Videos
  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise SECTION RELATED QUESTIONS|24 Videos
  • WBCHSE QUESTION PAPER -2019

    CHHAYA PUBLICATION|Exercise SECTION - II ( GROUP -D)|10 Videos

Similar Questions

Explore conceptually related problems

A box is lifted vertically by 6m in 3 s. (ii) if the box is lifted in 5 s instead of in 3 s , what would be the change in the work done ?

A box was lifted vertically through a height of 6m in 3s . If the box would have been lifted in a zig-zag way in 5 s ,work done would have been same. Is the statement true or false ?

Mass of a rod of length 4m is 3 kg. Its centre of gravity is 1.5 m from one of its ends. At the other end a mass of 8 kg is tied up. The rod is at a horizontal position. It is turned to a vertical position in such a way that the 8 kg mass goes to the top. What is the work done in changing the orientation of the rod ?

Water is dropped at the rate of 2 m^3 /s into a cone of semi-vertical angle is 45^@ . If the rate at which periphery of water surface changes when the height of the water in the cone is 2m is d. Then the value of 5d is _____ m/sec

A lift of mass 200 kg is moving up with an acceleration of 4 m cdot s^(-2) . What is the tension in the lift cable? If the lift moves down with the same acceleration, what will be the tension in that case? [ g = 9.8 m cdot s^(-2) ]

A glass if filled with water up to 12.5 cm. The apparent depth of an needle lying at the bottom of the tank is measured by microscope to be 9.3 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.6 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?

A lift in a mine moves down 24m in 8 mins. If its moves in an uniform rate, let's find at what distance below the surface, it will be after 6 mins. If the lift starts from a height 10 m above the ground, let's find how deep the lift will go from the surface after 70 mins.

CHHAYA PUBLICATION-WORK AND ENERGY-HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS
  1. Gravitational force is a conservative force, but frictional force is n...

    Text Solution

    |

  2. Can kinetic energy of a body be negative ?

    Text Solution

    |

  3. Momentum of a body is increased by 100 % . What is the percentage incr...

    Text Solution

    |

  4. An electron and a proton are detected in a cosmic ray experiment . Bot...

    Text Solution

    |

  5. Is air resistance a conservative force ?

    Text Solution

    |

  6. A box is lifted vertically by 6m in 3 s. (i) If the box is lifted t...

    Text Solution

    |

  7. A box is lifted vertically by 6m in 3 s. (ii) if the box is lifted ...

    Text Solution

    |

  8. A hydrogen -gas -filled balloon of mass m can rise to a maximum heigh...

    Text Solution

    |

  9. What is the percentage increase in the momentum of a body when its ki...

    Text Solution

    |

  10. A particle of mass m, moving with a constant acceleration , acquires ...

    Text Solution

    |

  11. Is it possible to increase the kinetic energy of a body without applyi...

    Text Solution

    |

  12. Height of the vertex of an inclined plane is h . From the vertex , a ...

    Text Solution

    |

  13. A body tied to a thread is made to revolve in a horizontal plane with...

    Text Solution

    |

  14. Two bodies of different masses have the same momentum. Compare their ...

    Text Solution

    |

  15. Unbalanced system of forces can produce acceleration as well as deform...

    Text Solution

    |

  16. What are the characteristics of an elastic collision between two bodi...

    Text Solution

    |

  17. Two protons are drawn near each other . Will the potential energy of t...

    Text Solution

    |

  18. What is the condition for the collision of two bodies to be one-dimens...

    Text Solution

    |

  19. A shot is fired from a gun. What will be the changes in momentum and k...

    Text Solution

    |

  20. A molecule in a gas container hits a horizontal wall with a speed of 2...

    Text Solution

    |