what are 15 concepts from physics that are applied when playing football and or croquet?
965400
All 3 types of levers. for one.\n\n\nNext...
259374
The one word answer is, spin. In fact, in 1671 Sir Isaac Newton noted how the flight of a tennis ball was exaggerated by spin. However, there is more to the curve that just that. The curve of a spinning ball, be that of a tennis ball, baseball, golf-ball, or even a cannon ball is due to a phenomenon coined the “Magnus Effect”. In 1877, Lord Rayleigh credited Magnus with the first “true explanation” of the effect.\n\nThe explanation of the Magnus Effect is a relatively simple exercise in aerodynamics and conservation of momentum. When any object is moving through a fluid, such as air, its surface interacts with a thin layer of air known as the boundary layer. In the case of the sphere or ball, the boundary layer separates from the surface, creating a wake or low-pressure region behind the ball. The front-to-back pressure difference creates a backward force on the ball, which slows its forward motion. This is the normal air resistance, or aerodynamic drag, that acts on every object. However, if the ball is spinning as it moves, the boundary layers separates at different points on opposite sides of the ball — further upstream on the side of the ball that is turning into the airflow, and further downstream on the side turning with the airflow.\n\nConsequently, the air flowing around the ball is deflected slightly sideways, resulting in an asymmetrical wake behind the ball. If it is assumed that the air in the wake has “left” momentum, for momentum to be conserved the ball must possess an equal but opposite or “right” momentum. Hence a sideways deflection in the trajectory occurs. The magnitude and direction of this resulting momentum vector and its corresponding Magnus force is directly dependent on the velocity vector of the ball with respect to the air, angular velocity vector of the ball, surface roughness, cross-sectional ball area, and air density. Examining each of these items and their influence on the magnitude and direction of the curve we see that:\n\n1.Velocity and angular velocity: Primarily, these vectors define the direction the ball curves, which is mutually perpendicular to both vectors (see: Alaways & Hubbard). Secondly, spin rate has a one-to-one correspondence with the curve’s magnitude, the higher the spin rate the greater the curve. Finally, the ball speed has an inverse proportional relationship to the curve, the faster the pitch the smaller the curve.\n\n2.Surface roughness and cross-sectional area: These factors influence the curve by being the means by which the air is deflected. In essence the seams on the ball grab the air and redirect it. Imagine the paddles on a paddle wheel as it moves through water, the larger the paddles the bigger the splash. An increased ball cross-sectional area allows for more air to be deflected by having more surface area in contact with the air and therefore more air available to redirect.\n\n3.Air density: We all have heard that baseballs curve more at sea level than in the Rocky Mountains. This is due to increased air density at sea level resulting in increase momentum for equal volumes of redirected air. Since momentum is conserved the ball’s momentum goes up with the air’s momentum resulting in larger curves at lower elevations.
65071
Force = mass x acceleration\n Mass = weight times gravity\nAcceleration is speed/time\n example if I’m playing football and I want to move the other player assuming we are both on the same planet (gravity is constant) and we are both moving at the same speed at each other I can do so if am heavier than him (increase wt (g) = increase mass) or I decease the time it takes to reach that player (constant speed and distance in less time = acceleration) or I can do both. This is how you increase force by increasing acceleration, mass, or both
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Soccer\nCricket\nBaseball\nBasketball\nGolf
104512
Bring your racquet....\n\nDon't forget the ball...
580059
If you take a ball and hold it out at arms length, it has potential energy. This energy is being held back by your hand and once you release the ball, gravity turns that potential energy into kinetic energy (movement) and makes it hit the floor.
548088
My favorite is an overhand sinker. Hold the ball with your pointer and middle finger on the top and your thumb on the bottom and the slots facing your palm. Throw the ball over hand with kind of a football throwing motion bring your two finger snapping over the top. The ball goes much faster than a curve or slider and has a sharp, late drop that fools most hitters. Best when thrown in on the hands. \n\nI also like the sidearm riser. Hold the ball like you would for a curve. Throw the ball with a big, sweeping submarine motion and the ball will rise and break across the plate.
1162008
Most of these principles are addressed in detail in physics text books.  Perhaps you might try at a local college or high school  library.
744148
inf. in this site\nhttp://www.itftennis.com/coaching/publications/nonitfpubs/science/minitennis.asp
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1)Start by modelling the speed of a ball in one direction; take into account friction force (negative drag) that is equivalent to negative acceleration. Loop until speed is equal or less than to zero. Then, stop.\n\n2) Do Exactly the same, now in a 2-D space: model how'd the would move given an initial vector speed.\n\n3) Model a "Hit" on a ball: given an instant (vector) speed plus a "Hit Vector", compute the resultant vector; then use that vector as the initial speed again.\n\n4) develop a "Hit?" function that returns true if the difference between the centers of the balls is less than the diameter, or if the center of the ball is closer than a radius to a wall (the stick can be thought of as another ball)\n5) Every time Hit? is true, recompute vector speed for every involved ball.\nVoila! you have your game. Let me know if it's useful and the results.
772306
jump rope\nrunning stairs\n40 yard dash runs\nsquats
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Baseball\nFootball\nGolf\nBasketball\nNascar\nHunting\nFishing\nSoftball\nVolleyball\nWrestling (NOT pro)\nHockey
427466
Racquetball is a sport played with racquets and a hollow rubber ball on an indoor or outdoor court. It was invented by Joe Sobeck in 1949 incorporating rules from squash and handball. Unlike many other racquet sports, the walls, floor, and even ceiling of the racquetball court are considered in-bounds. The game is normally played by two players, though there are variations with three or even four (which can get very crowded). Two player games are called singles, three player games are typically called iron-man (2 on 1 during entire game) or cut-throat (each player take turns serving to the other 2), and four player games are called doubles.
401145
through the ball with a spin
999772
Football. Especially lineman. Your being hit by someone who very strong, continusly for about and hour and 30 mins. The only break u get is half-time.
576880
first, strive to be ambidextrous (ability to dribble with both hands). then learn the Spin Move, Pivoting, Thru The Legs, Windmill, Butterfly, Spider, Etc. Basics are all the same. Juz Pass the ball more often & avoid too much body contact with opponents. we're not professionals anyway. Let the Centre or Forwards do the scoring job.
1168507
Here is one example...the bouncing ball. Just google that in and you get a bunch of results.