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arcticf0x Group Title

Projectile motion

  • 2 years ago
  • 2 years ago

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  1. arcticf0x Group Title
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    let me draw it out

    • 2 years ago
  2. JamesJ Group Title
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    Ah @eashmore is here. He eats these problems like popcorn at a movie.

    • 2 years ago
  3. eashmore Group Title
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    Only if the butter isn't too thick!

    • 2 years ago
  4. arcticf0x Group Title
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    its not a problem, its just one stupid question, i am not able to draw properly with this editor lol

    • 2 years ago
  5. JamesJ Group Title
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    Draw a picture, take a picture of it and upload it. I do that all the time. Let us know when you're ready

    • 2 years ago
  6. arcticf0x Group Title
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    yep! one second

    • 2 years ago
  7. arcticf0x Group Title
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    My question is, will the time from O to P will be equal to P to S when there is air drag?

    • 2 years ago
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  8. arcticf0x Group Title
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    Popcorn! lol

    • 2 years ago
  9. JamesJ Group Title
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    No, it is not. Classic question in kinematics. And why not?

    • 2 years ago
  10. arcticf0x Group Title
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    But the trajectory is different from P to S right? so why not?

    • 2 years ago
  11. JamesJ Group Title
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    On the way up to the top of it's trajectory, there are two forces acting: gravity and air resistance. Air resistance of course is always in the direction of -v, the velocity vector. Air resistance has negative y component and gravity is in the negative y direction. On the way down, the air resistance has positive y component and hence the net force in the y direction is less than on the way up. The result is the magnitude of the force on the object on the way up is more than it is on the way down. So the time required to reach the top of its trajectory is created than the time required for it to travel from the top to the bottom.

    • 2 years ago
  12. JamesJ Group Title
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    To convince yourself of this, take a large piece of paper, like a newspaper. Crumble it up into a rough ball. Throw it up and notice it takes less time to reach the top of its trajectory than it does to come down.

    • 2 years ago
  13. arcticf0x Group Title
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    Nah, i understood it from, when i serve in tennis, it takes more time to go up but land a bit faster in the box! Gravity and air restistance! I always liked the symmetry for projectiles until yesterday i watched this lecture on air drag! Thanks a lot @JamesJ !!!!

    • 2 years ago
  14. arcticf0x Group Title
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    lands*

    • 2 years ago
  15. eashmore Group Title
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    This effect is most noticeable on the smaller curves.

    • 2 years ago
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  16. arcticf0x Group Title
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    Oh ok!

    • 2 years ago
  17. arcticf0x Group Title
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    /offtopic Lets make it 1000 medals tonight @JamesJ ! :D

    • 2 years ago
  18. JamesJ Group Title
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    ?

    • 2 years ago
  19. arcticf0x Group Title
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    • 2 years ago
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  20. arcticf0x Group Title
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    haha leave it if you dont care :P

    • 2 years ago
  21. JamesJ Group Title
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    Ah! I haven't looked at that number for a long time. Yes, why not? ;-)

    • 2 years ago
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