Home
Class 11
PHYSICS
A person of mas 50 kg carryign a load of...

A person of mas 50 kg carryign a load of 20 kg walks up a staircase. If the width and heigh of each step are 0.25 mand 0.2 m respectively, the work done by the man in walking up 20 steps is `(g=10ms^(-2))`

A

1400 j

B

800 j

C

2000 j

D

2800 j

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (ENERGY)|33 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (POWER)|17 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (SCALARS (OR) DOT PRODUCT)|9 Videos

  • WORK POWER ENERGY

    AAKASH SERIES|Exercise EXERCISE - 3|61 Videos

Similar Questions

Explore conceptually related problems

A person of mass 50 kg carrying a box walks up a staircase. The height and width of each step is 20 cm and 15 cm. If the work done in walking up 50 steps is 7840j, the mass of the box is,

A man of mass 80 kg carrying a load of 20 kg walks up a stair case in 20s. If the number of steps is 40 and which and height of each step are 20 cm and 15 cm respectively. The efficiency of the man is

Two persons A and B each of mass 60 kg are carrying loads 15 kg each. If they reach the top of a building of height 10 m in 20s and 40s respectively, the ratio of their efficiencies is

The work done in lifting a body of mass 20 kg and specific gravity 3.2 to a height of 8m in water is (g=10ms^(-2))

AAKASH SERIES-WORK, POWER & ENERGY -EXERCISE - II (WORK)
  1. The length of a smooth inclined plane of incilination 30^(@) is 5 m. T...

    Text Solution

    |

  2. A body of mass 10 kg is raised from certain depth. By the time is rais...

    Text Solution

    |

  3. A bucket fillled with water weighing 20 kg is raised from a well of de...

    Text Solution

    |

  4. A block of mass m is lowered with the help of a rope of negligible mas...

    Text Solution

    |

  5. A force barf=(hati-3hatj+2hatk)N moves a particle from bar r(1)=2hati+...

    Text Solution

    |

  6. A uniform chain of length 2 m is kept on a table such that a length of...

    Text Solution

    |

  7. n identical cubes each of amss m an side I are on the horizontal surfa...

    Text Solution

    |

  8. A person of mas 50 kg carryign a load of 20 kg walks up a staircase. I...

    Text Solution

    |

  9. A rectangular block of dimensions 6m xx 4m xx 2m and of density 1.5 gm...

    Text Solution

    |

  10. A body of mass 5 kg moving alonga straight line is accelerated from 4m...

    Text Solution

    |

  11. A uniform rod of length 2m and mass 5kg is lying on a horizontal surfa...

    Text Solution

    |

  12. A ladder .AB. of weight 300 N and length 5 m is lying on a horizontal ...

    Text Solution

    |

  13. Force acting on a particle is (2hati+3hatj)N. Work done by the force i...

    Text Solution

    |

  14. A force of (4x^(2)+3x)N acts on a particle which displaces it from x=2...

    Text Solution

    |

  15. Velocity -time graph of a particle of mass 2 kg moving in a straight l...

    Text Solution

    |

  16. A force of 5N is applied on a 20 Kg mass at rest. The work doen in the...

    Text Solution

    |

  17. A body moves a distance of 20 m along a striaght line under the action...

    Text Solution

    |

  18. The work done in lifting a body of mass 20 kg and specific gravity 3.2...

    Text Solution

    |

  19. The work done in carrying a body from A to B is 20 J and from B to C i...

    Text Solution

    |

  20. A locomotive of mass 'm' starts moving so that its velocity varies as ...

    Text Solution

    |