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anonymous

  • one year ago

A gnat takes off from one end of a pencil and flies around erratically for 25.1 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 3.15 meters, and the pencil is 4.63 cm long, find the gnat\'s average speed, as well as the magnitude of the gnat\'s average velocity vector.

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  1. NotTim
    • one year ago
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    The proper steps in doing any physics question are: Write down variables, draw your FBDs, and break it down into its x and y components.

  2. anonymous
    • one year ago
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    Alright. So what would be what?

  3. anonymous
    • one year ago
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    Because I've been doing it by division.

  4. NotTim
    • one year ago
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    http://www.smarterthanthat.com/physics/physics-dont-panic-10-steps-to-solving-most-physics-problems/ starting at 4 or 5.

  5. anonymous
    • one year ago
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    So do I need to subtract the two distances then divide by time?

  6. NotTim
    • one year ago
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    No.

  7. anonymous
    • one year ago
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    Then I'm confused.

  8. NotTim
    • one year ago
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    What's the difference between speed and velocity.

  9. anonymous
    • one year ago
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    velocity is a vector I think

  10. NotTim
    • one year ago
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    And what's the properties of a vector?

  11. anonymous
    • one year ago
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    derived. I know velocity is m/s

  12. anonymous
    • one year ago
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    So should I just ignore the 4.63 cm part and just stick with the 3.15 meters?

  13. NotTim
    • one year ago
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    Here's a big hint: 3.15 m is for the speed, and the velocity is directly related to 4.63 cm.

  14. anonymous
    • one year ago
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    Okay so it would be 3.15m/ 25.1s then?

  15. NotTim
    • one year ago
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    Which one would that be solving for?

  16. anonymous
    • one year ago
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    speed?

  17. NotTim
    • one year ago
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    Yes.

  18. anonymous
    • one year ago
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    Because for the velocity you would take 3.15 *.0463/25.1

  19. anonymous
    • one year ago
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    Okay so it would be 3.15m/25.1s =.125 m/s?

  20. NotTim
    • one year ago
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    And what's that solving for?

  21. anonymous
    • one year ago
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    that's solving for speed. The .125 m/s

  22. NotTim
    • one year ago
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    Correct.

  23. NotTim
    • one year ago
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    How about velocity?

  24. anonymous
    • one year ago
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    It would .00184 m/s

  25. anonymous
    • one year ago
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    Thanks for the help!

  26. NotTim
    • one year ago
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    (don't forget that velocity requires direction too)

  27. anonymous
    • one year ago
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    Right. I think I got it. Thanks for your help!

  28. NotTim
    • one year ago
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    Good stuff. seeya

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