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ashna Group Title

How much work is done by a coolie walking on a horizontal platform with a load on his head ? justify .

  • one year ago
  • one year ago

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  1. akash123 Group Title
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    zero

    • one year ago
  2. ashna Group Title
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    can yu explain ?

    • one year ago
  3. akash123 Group Title
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    |dw:1348894242952:dw|

    • one year ago
  4. akash123 Group Title
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    N is the force applied by coolie on the load...right?

    • one year ago
  5. ashna Group Title
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    yes

    • one year ago
  6. akash123 Group Title
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    |dw:1348894348026:dw|

    • one year ago
  7. akash123 Group Title
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    now...definition of work= F . (Displacement) it's a dot product....right?

    • one year ago
  8. ashna Group Title
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    right

    • one year ago
  9. akash123 Group Title
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    |dw:1348894463777:dw|

    • one year ago
  10. akash123 Group Title
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    work done by coolie = N *( displacement) * cos 90'

    • one year ago
  11. ashna Group Title
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    yes 0 , okay ty :)

    • one year ago
  12. akash123 Group Title
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    :)

    • one year ago
  13. sam291 Group Title
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    But if he wasn't exerting a force with the help of friction, on the platform, in the opposite direction from where he's going, then he wouldn't move forward. And the force in the opposite direction caused by friction will be greater because of the load on his head. Am I wrong?

    • one year ago
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