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anonymous

  • one year ago

A snail moving in the positive (+) direction at an inital velocity of +0.67 cm/s decreases its speed with an acceleration of -0.0059 (cm/s)/s. How many seconds would it take to reach a velocity of +0.58 cm/s?

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  1. anonymous
    • one year ago
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    \[v _{f}=v _{i}+at\] where vf is final velocity vi is initial velocity a is acceleration t is time.

  2. anonymous
    • one year ago
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    They are all in cm, so you dont have to convert.

  3. anonymous
    • one year ago
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    So Vf = .67 + (-.0059)(.58)?

  4. anonymous
    • one year ago
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    Ask yourself: What is this problem looking for?

  5. anonymous
    • one year ago
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    and what is given?

  6. anonymous
    • one year ago
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    It's wanting the amount of seconds to reach .58 cm/s. The inital and acceleration are given.

  7. anonymous
    • one year ago
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    How many seconds would it take to reach a velocity of +0.58 cm/s? Final velocity is given too.

  8. anonymous
    • one year ago
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    You are right. They want seconds which is time (t) Now plug in the formula again.

  9. anonymous
    • one year ago
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    -0.0059=(.58-.67)/(t)

  10. anonymous
    • one year ago
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    Would that be the set up?

  11. anonymous
    • one year ago
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    Yes, that is correct. It would be better if you the t by itself though.

  12. anonymous
    • one year ago
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    And you divide the -0.0059 by (.58-.67)?

  13. anonymous
    • one year ago
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    Yea thats like algebra right there.

  14. anonymous
    • one year ago
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    So I should get 15.25423729

  15. anonymous
    • one year ago
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    Looks correct!

  16. anonymous
    • one year ago
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    And what your answer be in sf?

  17. anonymous
    • one year ago
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    15

  18. anonymous
    • one year ago
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    Yes!

  19. anonymous
    • one year ago
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    Thanks for the help

  20. anonymous
    • one year ago
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    No problem! The answer is 15 seconds btw or just 15 s

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