When you kick a soccer ball (football) with the inside of your right foot, it curves from right to left. The same is true of a volley ball and tennis ball.
But when you do the same thing to a beach ball, it curves from left to right (opposite direction).
Can anyone explain why?
2007-12-03 05:04:21 · 6 answers · asked by Dr D 7 in Science & Mathematics ➔ Physics
There are no sources. This is from experience. Try it with a soccerball and a beach ball.
2007-12-03 05:31:57 · update #1
It doesn't really depend on the size of the ball per se, because a soccer ball and beach ball of comparable sizes still behave differently.
It might have something to do with turbulent boundary layer separation.
2007-12-04 01:49:59 · update #2
I'm guessing that your foot is imparting different spins to each. Probably has to do with the lower pressure of the beach ball.
It sounds like what golfers call a 'draw' shot, moving down and to the left, and a 'fade' shot moving up and to the right. My guess is that in kicking a beach ball, you get under it slightly and it rolls off of your toe. Where as with the soccer ball, you get slight top spin which is oriented somewhat right to left.
It would primarily be the result of the beach ball 'sticking' to your foot -- being much more inelastic.
Your the tennis guy. Think topspin forehand. You start out below the ball and round out over the top. The ball also goes left. Now slice. You get underneath and the ball rolls off the end of your racket and fades right. When kicking, your leg/foot can't roll over the top of the beach ball (it would either roll away or cause you to trip) the way you do with other balls. You just can't help hitting a fade shot.
Tried hard, but can't think of any other explanation.
2007-12-04 09:58:05 · answer #1 · answered by Frst Grade Rocks! Ω 7 · 1⤊ 0⤋
It is a term use for "something unexpected" that may cause a problem. Like "Life keeps throwing curve balls to keep me on my toes." It is used in relation to a pitcher in a game of baseball thowing the curve ball which is had to prroject where s it coming from and how to hit it.
2016-03-15 05:33:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
☻ so you are kicking to the left, and it’s flying to the right?
Right? Unless it’s a sorta my previous question about acid ksoyezleaugique(LOL) I try it! OK? I seem to have had this experience too;
♠ when kicking, the kicking kinetic energy of your kicking foot is distributed between kinetic energy of translation and kinetic energy of rotation of the kicked ball;
♣ soccer ball’s diameter being close to the size of your foot, you never miss center of mass; so kinetic energy of translation is the main part of total energy;
♦ beach ball; to make a smart kick you aim to hit it a bit under its center of mass;
as a result it gains rotation KE mostly rolling over your kicking foot due right, then rolling on along the ground;
♥ not much a proof, but this must be a general idea;
↓
I see I’ve flunked this exam, drat! Yet I try it once more since our generous Doctor permits to correct the answer;
♠ compared to beach ball the soccer ball is more massive and more inert; thus the gush of air from my foot does not produce much effect on the soccer ball;
♣ meanwhile the gush of air going under the beach ball would lift it up from the ground, so instead of supposed translation momentum the beach ball would gain rotation momentum from the kicking foot;
♦ (here I just copy the tail of my previous answer);
as a result it gains rotation KE mostly rolling over your kicking foot due right, then rolling on along the ground;
♥ not much a proof, but this must be another general idea;
and I must admit here I’m giving almost the same answer as the first guy nacsez!
2007-12-03 10:19:31 · answer #3 · answered by Anonymous · 1⤊ 0⤋
that would give the ball counter clockwise spin if im understanding you correctly...
the only thing i can think of is the ratio of weight to force. maybe the soccer ball just looks like its going from right to left cause it has more intertia to keep going that way. the reactionary force would create a pressure differential (per Bernoulli's principle) which would push the ball from left to right. this force will be more apperent with the lighter ball. im not sure ive ever heard of this before though... might want to double check your sources
2007-12-03 05:29:18 · answer #4 · answered by nacsez 6 · 2⤊ 0⤋
I can see vivid pictures from experiance.
Observations:
Soccer ball curves to the left. (It might spin to the left, also.)
Beach ball floats up higher and to the right, resisting spinning.
2007-12-03 05:33:58 · answer #5 · answered by Anonymous · 1⤊ 0⤋
im no genius but i believe it would depend on what kind of material the ball is and the weight
and depends on how and where you make contact with the ball
by the way check some amazing goals...
http://www.youtube.com/watch?v=dwRYYeEk5Eg&feature=related
http://www.youtube.com/watch?v=C83X7UBqXAE&feature=related
2007-12-03 08:25:28 · answer #6 · answered by Anonymous · 4⤊ 0⤋