What kind of empirical data is there about sliding into first base?
439185
Running is faster because the runner is moving a full speed through first base.  With sliding she would have the static friction with the ground, which would slow her down slightly.  Also, as soon as she leaves the ground to slide, there's no more propulsion, which slows her down even more.
320665
It's a strike.  He's only awarded 1st base if he's not attempting to hit it.  See rule 6.08(b)\n\n(b) He is touched by a pitched ball which he is not attempting to hit unless (1) The ball is in the strike zone when it touches the batter, or (2) The batter makes no attempt to avoid being touched by the ball; If the ball is in the strike zone when it touches the batter, it shall be called a strike, whether or not the batter tries to avoid the ball. If the ball is outside the strike zone when it touches the batter, it shall be called a ball if he makes no attempt to avoid being touched. APPROVED RULING: When the batter is touched by a pitched ball which does not entitle him to first base, the ball is dead and no runner may advance
1129372
No! There is no such thing as a steal of first base.  A batter can reach first base when a catcher drops a third strike and the batter beats the throw to first.
576265
first base it a force out because the runner has no other choice but to go to 1st base. 3rd base is a force out if thee are runners on 1st and 2nd bases.
666782
The slider is thrown with pressure applied to the index and middle finger along with pressure added to the thumb. The index and middle fingers "split" the top seams. The thumb however, is placed on top of the bottom seam. An important step in throwing a proper slider is to snap your wrist in a side to side motion as you release the baseball. When thrown properly, it will dart from right to left in a sweeping motion (left to right if you are left handed). The science behind this pitch is that the force applied to the index and middle fingers causes the ball to slide when it is thrown. With this and the combination of snapping your wrist, the baseball actually fights inertia and sharply slides during its flight to home plate. \n\nThe change up is one of the hardest pitches to throw. It really doesn't matter where your fingers are placed (unlike the fastball and slider). After you form an O.K. symbol with your hand it is important to squeeze the ball tightly. Finally, you must snap your wrist in the opposite side to side motion of a slider as you release the ball. In otherwards if you are right handed you will snap your wrist counterclockwise (clockwise if you are left handed). It is also important not to throw this pitch as hard as the fastball and slider. The science behind this pitch is that the friction applied from the O.K. hand signal causes the ball to be released at a slower rate. With the torque of your wrist, the ball once again fights inertia and travels from left to right while on its path to home plate (right to left if you are left handed). However, this time the baseball will lose velocity due to the firm grip and act in a tumbling manner as it approaches home plate.  \n\n**WARNING: it is advised that kids under the age of 18 do not try and throw the slider frequently as it may severely damage your hand**
654110
wow guinevere kate, i didn't know you were proud of me. lol. see you at practice!\n\nfor those who didn't understand:\ni made the batter walk so by doing this, he can only go to the first base. if you have to take the walk, you are only allowed to go to the next base...nowhere else. the game doesn't and with him taking the walk...there are a lot of oppurtunities to tag him throughout the game.
169628
Well, really the best way is to have them do it.  Positioning depends on the hitter at the plate.  If they're a power hitter, play behind the bag off the line.  If they're a lefty pull hitter with power, guard the line a little more.  Bunting  situations, play in line with the bag at first base and the pitching rubber, guarding the line.  When they square around to bunt, start moving in towards the bag.  If the catcher, pitcher or 3rd baseman is going to get the ball on a bunt, get out of the line of fire!  If the batter is a slap hitter, play somewhere between the power hitter and bunting positions.  Other than that, it's really just a matter of hitting a few hard ground balls and pop-ups to the infield for the first baseman to get used to it.
297847
The best method of learning to slide is to start on a wet surface.  Wet grass will stain any clothes but is most practical.  A slip and slide is usually the easiest.  The first part of the lesson is to have the individual drop to one side from a squatting position in order to get the feel of falling and landing on one side.  There will be one leg closer to the ground and bent at the knee.  The weight should be rolling backwards.  The other leg should be straight and the toe should be pointing to the base.  It should also be free to move in space so one can avoid the tag.  The individual could lie on the ground in this position to get comfortable to the unique feeling.  Once this is completed then try and run a couple of steps and drop into the sliding position.  As one gets a good feeling for this, then try from farther distances.  Finally have a catcher throw to an infielder to practice avoiding the tag and then move to the real dirt field.  \n\nThe key to sliding is to get down at the proper time and do not let the upper leg get jammed into anything, like another player or the base.  Injuries also happen on the bottom leg and the butt if the landing is awkward.  \n\nGood luck and enjoy the game.
874034
It is the first derivative.
617665
is there an unlimited amount of moves?...if there is, starting pitching is disposable...you should trade for closers, & switch out starting pitching daily...that way, you should win 3 out of the 5 pitching categories (wins, k's, saves)...closers with high value are Papelbon & Dempster because they can alternate between SP, RP, & P...if you're looking for stolen bases, i would try to pick up Lugo, Suzuki, Figgins...however, if you don't want to compromise HR, RBI's, etc., maybe you can get guys like J. Bay, Abreu, Beltran...hope this helps
954809
1st base: Kissing, making out\n2nd base: Any hands-on contact with any happy zones\n3rd base: Replace hands with mouth or tongue\nHome: Giggity giggity giggity
564603
Feet first is safer.  It also provides the ability to pop-up and advance if the ball is overthrown or an error occurs.  Getting off your stomach takes more time.  There really isn't a need to slide head first when advancing to a base because you'll get there faster on your feet.  Diving back on a pick off or an attempt to jar the ball from the catcher are the only two situations where a head first attempt is called for.
321258
The first site shows how it is derived and the second how it is used.  Good luck.
630643
First point, disagree. Not everybody knows how to slide properly. Even if they do, every time you slide into second, possible injury comes into play for the fielder and the runner.\n\nSecond point, umps already do. They make sure the player touches the bag, before they call him out.
1040497
Pitcher's statistic: Ratio of strikeouts (k) to walks (bb).  If a pitcher has struckout 10 batters, and walked 5, his k/bb = 10/5, or 2.0.  \n\nIt's an indication of his command, if he strikes out more batters than he walks, he has good control of his pitches.
1079861
Rule 7.05 covers a player deliberately using a piece of his uniform to touch a batted ball, but I would imagine that doesn't apply here, especially as the first basemen is not making the put out.  I believe the runner is out.
518793
because it is easier on the baserunner when scoreing at home if he slides that end part that sticks out is easier to touch without getting out