Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

lgbasallote

  • 2 years ago

A person walks first at constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is her average speed over the entire trip?

  • This Question is Closed
  1. A.Avinash_Goutham
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :/

  2. A.Avinash_Goutham
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    30/8

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

    15 meters?

  4. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    why not just 1? i mean it's simpler isnt it?

  5. shubhamsrg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    total dist = 2d total time = d/5 + d/3 = 8d/15 so avg speed = 2d/(8d/15) so @A.Avinash_Goutham was right!! yet again! :D

  6. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4m/s

  7. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so it will be 30/8 seconds?

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

    When the distance is fixed, just find the harmonic mean.

  9. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i mean m/s

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

    what does harmonic mean mean again?

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

    For two number a and b the harmonic mean is given by 2ab/(a+b)

  12. kropot72
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Speed = (distance traveled)/(time taken) Total distance traveled = 0 Speed = 0 m/s

  13. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    where a and b are...?

  14. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the given values?

  15. cwrw238
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    speed = distance / time if distance = 1 5 = 1 / 0.2 also 3 = 1 / 0.3333 average speed = 2 / 0.53333

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

    a=5 and b =3 or vice-versa

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

    its 3.75 m/s 4 is wrong

  18. A.Avinash_Goutham
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if it's equal " time " u shud use........arithmetic nd equal dist u shud use..........harmonic

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

    this is effective everytime d is equal?

  20. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    total distance /total time travelled

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

    Yes lgba and when time is equal find the arithmetic mean.

  22. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    arithmetic mean is..?

  23. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2d ----------- d +d -- ---- 5 3 2d --------- 8d ------ 15 2 ---- 8 ------ 15

  24. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2 ---- 8 --- 15 15 ---- 4

  25. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol yeah i got that part =)) btw...a follow-up question is what is the average velocity...the book says zero...is it because displacement is 0?

  26. A.Avinash_Goutham
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah it is zero

  27. shubhamsrg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes,,because disp is 0..

  28. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but its speed written in the question???

  29. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the first question was average speed

  30. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah but there is a difference displacement can come to zero bot distance cannot u should mention adds up whether how many time come and go from same point asdisplacement get zero

  31. Nick_Black
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    distance adds up*

  32. javawarrior
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol really? at 5m/s ?

  33. lgbasallote
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what? o.O

  34. javawarrior
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A person walks first at constant speed of 5.00 m/s <== that guy must be one heck of a power walker haha

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.