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

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 ?

Text Solution

Verified by Experts

Work done is independent of time . Hence , the same work is done in lifting the box in 5 s instead of in 3s.
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. (i) If the box is lifted to the same height in a zig-zag way 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 ?

A person trying to lose weight by burning fat lifts a mass of 10 kg up to a height of 1m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8xx10^7J of energy with a 20% effciency rate.Take g=9.8m//s^2

The inner length , breadth and height of a tea - box are 7.5 dcm, 6 dcm and 5.4 dcm respectively, The weight of the box fulled with tea is 52 kg 350 gms, but the weight of the empty box is 3.75 kg . Then what will be the weight of tea of volume 1 cu- dcm. ?

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 car of weight 20000 N drives up a hill at a steady speed of 8 m/s, gaining a height of 120 m in 100 s. Calculate (i) the work done by the car and (ii) the power of the engine of the car.

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

    |