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A man wighing 80 kg wt carrice a stone o...

A man wighing 80 kg wt carrice a stone of weight 20kg wt to the top a builling 30 m high .Calculatethe work done by him .Take `g=9.8 ms^(-2)`

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Knowledge Check

  • A person lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground .Calculate the work done by him (g=10 "ms "^(-2))

    A
    20 J
    B
    400 J
    C
    200 J
    D
    40 J

  • A porter lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage. (take g = 10" ms"^(-2) )

    A
    400 J
    B
    200 J
    C
    350 J
    D
    150 J

  • A man of mass 65 kg is holding a bucket of mass 15 kg. He walks 50 m on a level road at a constant speed of 3 m/s and then climbs up a hill of height 20 m. What is the work done by the man? Take g = 10 m/s^2 .

    A
    2.05kJ
    B
    3.5kJ
    C
    12kJ
    D
    16kJ

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    Explore conceptually related problems

    A load of 100 kg is pulled upwards by 5 m. Calculate the work done. [g = 9.8 m//s^(2)]

    An object of 100 kg is lifted to a height of 10 m vertically. What will be the work done ? [g = 9.8 m//s^(2)]

    A man of weight 60 kg f is carrying a load of 20 kg of on his head . He moves a distance of 25 m up an incline of 1 in 12 . Calculate the work done by him .

    A man fell into a manhole of depth 1 m. If his mass is 65 kg, then what should be the work done by him to come out of it (Take g = 10 ms^(-2) ).

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