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destineeeee

  • one year ago

While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration

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  1. destineeeee
    • one year ago
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    I have a=-2.5 mi/hsquared S

  2. destineeeee
    • one year ago
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    Is my answer correct?

  3. mailtoarko
    • one year ago
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    simple formula v = u - at put v = 30 u = 60 t = 12*60

  4. mailtoarko
    • one year ago
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    30=60(1-12a)

  5. mailtoarko
    • one year ago
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    12a =.5

  6. mailtoarko
    • one year ago
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    a = 1/24 =0.0416 in the negative x direction

  7. destineeeee
    • one year ago
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    that's the answer?

  8. mailtoarko
    • one year ago
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    is my answer wrong ??

  9. destineeeee
    • one year ago
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    all the possible answers are whole numbers

  10. mailtoarko
    • one year ago
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    then probably the answers are wrong because u and i both know that v = u-at is the formula unless any different condition is there in the question . so did u type the question correctly

  11. destineeeee
    • one year ago
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    no im i thought i saw periods sorry. the answers are -150 -6.0 -450 -2.5

  12. mailtoarko
    • one year ago
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    oh ho !! got it . your answers are given in hours . i considered speed in miles/hour but time i made it in seconds !!

  13. mailtoarko
    • one year ago
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    correct ans 30 = 60 - 12a a = 30/12 = 2.5 in negative x direction

  14. destineeeee
    • one year ago
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    no im i thought i saw periods sorry. the answers are -150 -6.0 -450 -2.5

  15. mailtoarko
    • one year ago
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    uff !! i am again wrong correct ans 30 = 60 - 12/60a a = 30* 60/12 = 150 mi/h^2

  16. mailtoarko
    • one year ago
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    this time i really got the ans .. after dividing 12/60 i just converted 12min in hours

  17. destineeeee
    • one year ago
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    which one would it be out of those 4?

  18. mailtoarko
    • one year ago
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    -150

  19. destineeeee
    • one year ago
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    thanks

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