A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

You drive a car 2.0 km to the gas station, 4.0 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20.0 min. What is your average speed? 3.2 m/s 4.38 m/s 8.75 m/s 0.525 m/s

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

    @Learner11

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

    @Nnesha

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

    @phi

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

    OKay so, S = distance/time

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

    So, you would want to add up how many kilometers you traveled first.

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

    that would be 10.5/20.00 right?

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

    Nope. If we are trying to find miles/seconds we need to convert them

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

    <Speed> = ....

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

    oh

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

    Do you remember calculating the 'average rate of change' given two points on a graph from algebra

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

    slope of a secant line connecting the two points on the graph...

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

    Dan can probably explain this better than me, so I leave this one to him

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

    I have no Idea what your talking about my brain just died

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

    It is the same as that, except it is a graph of (Total distance traveled) vs (total time traveled) for the y and x axis

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

    To get the average speed - you take the initial value point (0 min, 0 km) and the final point (20 min , (4.5+2.0+4.0) km ) and calculate the slope of the line through those

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

    In short, the average speed on an interval will be the ratio of the total distance traveled over the total time traveled

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

    @dan815

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

    \[ave~speed = \frac{ distance ~traveled }{ time of traveling }\]

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

    you will get km/min need to convert to m/s

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

    O.o

  21. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    http://prntscr.com/8kh2ht

  22. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    convert it into meters/second

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

    I DON'T UNDERSTAND x-x

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

    \[\frac{ X~km }{ 1~\min }*\frac{ 10^3~m }{ 1~km }*\frac{ 1~\min }{ 60~s } = \frac{ X * 10^3 }{ 60 }*\frac{ m }{ s }\]

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

    omg

  26. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay do you get that speed = d/t

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

    distance divided by time?

  28. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes speed tells you the rate of distance change over time

  29. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you saw that 10.5 km traveled in 20 mins right

  30. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tell me if that part is clear or not, gotta know this to move on

  31. dan815
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    10.5 = 2+4+4.5

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

    Everything

  33. 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.