A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Four weightlifters (A-D) enter a competition. The mass, distance, and time of their lifts are shown in the table (will draw inside!) Which weightlifter has 14,900 W of power? A, B, C, or D ?

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1433099459717:dw|

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry that is so messy!! w=weighlifter next column is "mass (kg)" then "distance (m)" and then "time(s)

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    values for mass: 100, 150, 200, 250 values for distance: 2.25, 1.76, 1.50, 1.25 values for time: 0.151, 0.052, 0.217, 0.206 in case it was too messy above lol :P

  4. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    here we have to compute this quantity: \[\frac{{mgD}}{t}\] for all of your four cases

  5. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    since the power developed by the worker is given by this formula: \[\frac{{mgD}}{t}\]

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok! how can we plugin?

  7. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    for example, if we consider the case of worker A, we get: \[\frac{{mgD}}{t} \cong 14618\;Watt\]

  8. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\frac{{mgD}}{t} = \frac{{100 \times 2.25 \times 9.81}}{{0.151}} \cong 14618\;Watt\]

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh okay! so for B we get 49804 C=13562 D=14881 so our solution is weighlifter D?

  10. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    for case D, is D=1.75 meters?

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    it is 1.25 :)

  12. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    sorry!

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    haha yes my bad it got very messy!!

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so it would be weightlifter D is our answer?

  15. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes! that's right! It is option D

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yay!

  17. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    :)

  18. 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

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.