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A porter lifts a luggage of 15 kg from t...

A porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage.

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Mass of luggage `m=15kg`, displacement `s=1.5m`
Work done `W=Fxxs`
`=mgxxs`
`=15kgxx10ms^(-2)xx1.5m`
`=225(kgms^(-2))m`
`=225Nm=225J`
Work done is 225 J.
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KUMAR PRAKASHAN-WORK AND ENERGY -QUESTION & ANSWER (TEXUTAL EXAMPLES/NUMERICALS)
  1. A force of 5 N is acting on an object. The object is displaced through...

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  2. A porter lifts a luggage of 15 kg from the ground and puts it on his h...

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  3. An object of mass 15kg is moving with a uniform velocity of 4ms^(-1). ...

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  4. What is the work to be done to increase the velocity of a car from 30k...

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  5. Find the energy possessed by an object of mass 10kg when it is at a he...

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  6. An object of mas 12 kg is at a certain height above the ground. If the...

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  7. Two girls, each of weight 400 N climb up a rope through a height of 8 ...

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  8. A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the hei...

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  9. An electric bulb of 60 W is used for 6 h per day. Calculate the 'units...

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  10. A force of 5 N is acting on an object. The object is displaced through...

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    |

  11. A porter lifts a luggage of 15 kg from the ground and puts it on his h...

    Text Solution

    |

  12. An object of mass 15kg is moving with a uniform velocity of 4ms^(-1). ...

    Text Solution

    |

  13. What is the work to be done to increase the velocity of a car from 30k...

    Text Solution

    |

  14. Find the energy possessed by an object of mass 10kg when it is at a he...

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    |

  15. An object of mas 12 kg is at a certain height above the ground. If the...

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    |

  16. Two girls, each of weight 400 N climb up a rope through a height of 8 ...

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    |

  17. A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the hei...

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    |

  18. An electric bulb of 60 W is used for 6 h per day. Calculate the 'units...

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    |