anonymous
  • anonymous
Projectile motion
Physics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
let me draw it out
JamesJ
  • JamesJ
Ah @eashmore is here. He eats these problems like popcorn at a movie.
anonymous
  • anonymous
Only if the butter isn't too thick!

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anonymous
  • anonymous
its not a problem, its just one stupid question, i am not able to draw properly with this editor lol
JamesJ
  • JamesJ
Draw a picture, take a picture of it and upload it. I do that all the time. Let us know when you're ready
anonymous
  • anonymous
yep! one second
anonymous
  • anonymous
My question is, will the time from O to P will be equal to P to S when there is air drag?
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anonymous
  • anonymous
Popcorn! lol
JamesJ
  • JamesJ
No, it is not. Classic question in kinematics. And why not?
anonymous
  • anonymous
But the trajectory is different from P to S right? so why not?
JamesJ
  • JamesJ
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.
JamesJ
  • JamesJ
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.
anonymous
  • anonymous
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 !!!!
anonymous
  • anonymous
lands*
anonymous
  • anonymous
This effect is most noticeable on the smaller curves.
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anonymous
  • anonymous
Oh ok!
anonymous
  • anonymous
/offtopic Lets make it 1000 medals tonight @JamesJ ! :D
JamesJ
  • JamesJ
?
anonymous
  • anonymous
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anonymous
  • anonymous
haha leave it if you dont care :P
JamesJ
  • JamesJ
Ah! I haven't looked at that number for a long time. Yes, why not? ;-)

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