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kaydra14

  • one year ago

A roller coaster starts down a hill at 10 m/s. Three seconds later, its speed is 32 m/s. What is the roller coaster’s acceleration? 7.3 m/s 2 7.3 m/s -7.3 m/s 2 -7.3 m/s

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  1. petiteme
    • one year ago
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    Do you know how to calculate the acceleration?

  2. kaydra14
    • one year ago
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    no can you help me

  3. petiteme
    • one year ago
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    Ok, sure. Let's use the formula: \[A = \frac{ Vf - Vi }{ t }\] Can you substitute the values?

  4. kaydra14
    • one year ago
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    can you give me an example

  5. petiteme
    • one year ago
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    Based on your question, what do you think is the final velocity?

  6. kaydra14
    • one year ago
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    32

  7. petiteme
    • one year ago
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    32 m/s :) That's your Vf = Final Velocity. What about your initial velocity?

  8. kaydra14
    • one year ago
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    10 m/s

  9. petiteme
    • one year ago
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    Good! That's your Vi = Initial velocity. What about the time?

  10. kaydra14
    • one year ago
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    3

  11. petiteme
    • one year ago
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    Great! You can substitute it already :)

  12. kaydra14
    • one year ago
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    thank you i think i got it now

  13. petiteme
    • one year ago
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    Okiedokes :) Good job!

  14. kaydra14
    • one year ago
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    when i solve the problem should it me m/s or m/s 2

  15. kaydra14
    • one year ago
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    when i solve the problem should it me m/s or m/s 2 @petiteme

  16. petiteme
    • one year ago
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    \[m/s ^{2}\]

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