Home
Class 11
PHYSICS
How much work is done by a coolise walki...

How much work is done by a coolise walking on a frontal plastikam vidio a load on his head ? Explain

Text Solution

Verified by Experts

W=0 as his displacement is along the horizontal direction and in order to balance the load on his head, he applies force on it in the upward direction equal to its weight. Thus angle between force and displacement is zero
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    FULL MARKS|Exercise Additional Question Solved (Long Answer Questions)|2 Videos

  • WORK, ENERGY AND POWER

    FULL MARKS|Exercise Additional Question Solved (Numercials)|11 Videos

  • WORK, ENERGY AND POWER

    FULL MARKS|Exercise Additional Question Solved (I. MCQ)|76 Videos

  • WAVES

    FULL MARKS|Exercise Additional Questions Solved (Numerical Problems )|10 Videos

Similar Questions

Explore conceptually related problems

Does the work done in raising a suitcase on to platform depend upon how far it is raised up?

How much work has to be done in assembling three charged particles at the vertices of an equilateral triangle as shown in figure

A body carrying a box on his head is walking on a level load from one place to another on a straight is doing no work. This statement is

How much work is done in moving a 500 muC charge between two points on an equipotential surface?

Calculate the work done by a person in lifting a load of 20 kg from the ground and placing it 1 m high on a table

A porter lifts a suitcase weighing 20 kg from the platform and puts it on his head 2.0 m above the platform. Calculate the work done by the porter on the suitcase.

Cogtrolled breeding experiments in animals are carried out by artificial insemination a. How is this done? b. Explain the merits of this method.

FULL MARKS-WORK, ENERGY AND POWER-Additional Question Solved (II. Short Answer Questions)
  1. What happens to the P.E. of a bobble when it rises in water ?

    Text Solution

    |

  2. A body is moving at constant speed over a frictionaless surface. What ...

    Text Solution

    |

  3. Define spring constant of a spring.

    Text Solution

    |

  4. How much work is done by a coolise walking on a frontal plastikam vidi...

    Text Solution

    |

  5. Mountain roads rarely go striaght up the slop, but wind up gradually. ...

    Text Solution

    |

  6. A truck and a car moving with the same K.E. on a stright road. Their ...

    Text Solution

    |

  7. Is in necessary that we does the motion of a body on a closed loop is ...

    Text Solution

    |

  8. How high most a body be lifted to gain an amount of P.E. equal to K.E....

    Text Solution

    |

  9. Give an example in which a force does work on a body but fails to chan...

    Text Solution

    |

  10. A bob is pulled sideway so that string becomes parallel to horizontal ...

    Text Solution

    |

  11. Two spring A and B are idential except that A is harder than B (k(A)g...

    Text Solution

    |

  12. Find the work done if a particle moves from position r(1)="to a positi...

    Text Solution

    |

  13. Spring A and B are identical except that A is stiffer than B, i.e., Fo...

    Text Solution

    |

  14. A ball at rest is dropped from a height of 12m. It loses 25% of its ki...

    Text Solution

    |

  15. Which of the two kilowatt hour or electron volt is a bigger unit of en...

    Text Solution

    |

  16. A spring of force constant k is cut info two pieces such that one piec...

    Text Solution

    |

  17. A car of mass 2000 kg is lifted up a distance of 30 m by a crane in 1 ...

    Text Solution

    |

  18. 20 J work is required to stretch a spring through 0.1 m. Find the forc...

    Text Solution

    |

  19. A pump on the ground floor of a building can pump up water to fill a t...

    Text Solution

    |

  20. A ball bounces to 80% of its original height. Calculate the mechanical...

    Text Solution

    |