Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

lgbasallote

  • 3 years ago

In 1990, walter arfeuille of belgium lifted a 281.5 kg object through a distance of 17.1 cm using only his teeth (a) how much work was done on the object by arfeuille in this lift, assuming the object was lifted at constant speed?

  • This Question is Closed
  1. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    im thinking \[-\Delta U_{GRAV}?\]

  2. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Right-o!

  3. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so \[\implies -(281.5)(9.8)(0-0.171)?\] i change this to meters right?

  4. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    0.171 is in metres already. I don't get your question.

  5. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that multiplication is the answer though..

  6. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the given was 17.1 i was confirming that i needed to change that to meters

  7. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    or do i use 17.1?

  8. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ah, yes, it is 0.171 that you need you need to use.

  9. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ahh thanks

  10. CarlosGP
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    His work was used to increase potential energy of the weight, therefore you can calculate like W=mgh=281.5x9.81x0.171 J I have heard that the work done later on by his dentist to fix his dentures was quite hard

  11. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a follow up question was (b) What total force was exerted on arfeuille's teeth during the lift what does that mean?

  12. CarlosGP
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The forced exerted was exactly F=mg=281.5 x 9.81 Newtons

  13. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It means that a downward force equal to the weight he lifted will be exerted on his teeth (the contact point).

  14. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Btw, @CarlosGP, I saw a man on TV lift a 1000kgs (a ton) with his teeth. Jus sayin.

  15. CarlosGP
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I saw another one make the Statue of Liberty disappear! ;) Can you believe it?

  16. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but this was for real. It was on 'Superhuman' on the DISCOVERY CHANNEL!

  17. CarlosGP
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I have to see under which conditions was the test carried out. I am not too sure neck muscles can stand that force

  18. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I'll try to find a video..

  19. CarlosGP
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @rajathsbhat, I would appreciate it! Thanks!

  20. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so for (b) it's just gravitational force?

  21. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @rajathsbhat

  22. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes. Sorry, I was busy searching for that vid.

  23. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    haha lol...

  24. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    and yes, it is the gravitational force.

  25. lgbasallote
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thanks!!`

  26. rajathsbhat
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yw.

  27. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy