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lgbasallote

  • 3 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?

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  1. A.Avinash_Goutham
    • 3 years ago
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    :/

  2. A.Avinash_Goutham
    • 3 years ago
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    30/8

  3. lgbasallote
    • 3 years ago
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    15 meters?

  4. lgbasallote
    • 3 years ago
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    why not just 1? i mean it's simpler isnt it?

  5. shubhamsrg
    • 3 years ago
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    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
    • 3 years ago
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    4m/s

  7. lgbasallote
    • 3 years ago
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    so it will be 30/8 seconds?

  8. FoolForMath
    • 3 years ago
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    When the distance is fixed, just find the harmonic mean.

  9. lgbasallote
    • 3 years ago
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    i mean m/s

  10. lgbasallote
    • 3 years ago
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    what does harmonic mean mean again?

  11. FoolForMath
    • 3 years ago
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    For two number a and b the harmonic mean is given by 2ab/(a+b)

  12. kropot72
    • 3 years ago
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    Speed = (distance traveled)/(time taken) Total distance traveled = 0 Speed = 0 m/s

  13. lgbasallote
    • 3 years ago
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    where a and b are...?

  14. lgbasallote
    • 3 years ago
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    the given values?

  15. cwrw238
    • 3 years ago
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    speed = distance / time if distance = 1 5 = 1 / 0.2 also 3 = 1 / 0.3333 average speed = 2 / 0.53333

  16. FoolForMath
    • 3 years ago
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    a=5 and b =3 or vice-versa

  17. Nick_Black
    • 3 years ago
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    its 3.75 m/s 4 is wrong

  18. A.Avinash_Goutham
    • 3 years ago
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    if it's equal " time " u shud use........arithmetic nd equal dist u shud use..........harmonic

  19. lgbasallote
    • 3 years ago
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    this is effective everytime d is equal?

  20. Nick_Black
    • 3 years ago
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    total distance /total time travelled

  21. FoolForMath
    • 3 years ago
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    Yes lgba and when time is equal find the arithmetic mean.

  22. lgbasallote
    • 3 years ago
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    arithmetic mean is..?

  23. Nick_Black
    • 3 years ago
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    2d ----------- d +d -- ---- 5 3 2d --------- 8d ------ 15 2 ---- 8 ------ 15

  24. Nick_Black
    • 3 years ago
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    2 ---- 8 --- 15 15 ---- 4

  25. lgbasallote
    • 3 years ago
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    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
    • 3 years ago
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    yeah it is zero

  27. shubhamsrg
    • 3 years ago
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    yes,,because disp is 0..

  28. Nick_Black
    • 3 years ago
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    but its speed written in the question???

  29. lgbasallote
    • 3 years ago
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    the first question was average speed

  30. Nick_Black
    • 3 years ago
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    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
    • 3 years ago
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    distance adds up*

  32. javawarrior
    • 3 years ago
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    lol really? at 5m/s ?

  33. lgbasallote
    • 3 years ago
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    what? o.O

  34. javawarrior
    • 3 years ago
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    A person walks first at constant speed of 5.00 m/s <== that guy must be one heck of a power walker haha

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