Once the batter/runner is forced out at 1st base, the force out of all other base runners is no longer in effect. Therefore, even if the original runner at 1st falls, he must be tagged out. He could, in fact, return to first and be safe there if he is not tagged out.
The hitter is a slow runner.
No, if there is a runner on first and the second baseman fields the ball and throws it to the shortstop, who muffs the play and allows both the runner and batter to advance/reach safely, the play would be ruled a fielder's choice and an error. It would still count as an at-bat and a non-hit for the batter, just as if the second-baseman had muffed the throw to the first-baseman with nobody on base.
The ump wouldn't call the baserunner out if the fielder kicked the base out from under him, no.
That would be considered a fielder's choice. Answers.com defines a fielder's choice as: "A play made on a ground ball in which the fielder chooses to put out an advancing base runner, thus allowing the batter to reach first base safely." Even though, in your question, the runner was not put out at home the play would be scored a fielder's choice and the batter would be credited with an RBI.
If the fielder has fielded a ball and has it in his possesion yes. If the fielder is in the path of the base and does not have the ball, the answer is no New answer: The fielder may enter the base path to field a BATTED ball and the runner must avoid contact whether the fielder has possession or not. The above answer is correct for a thrown ball only. (ie. the third baseman cannot position himself on the basepath while waiting for a throw from left field while the runner is advancing from 1st to 3rd on a hit.
The runner is probably out for interference by running into a fielder, if not, he is out if the throw to first beat the runner and the first baseman, or whom ever is covering first, had his foot on the bag when he received the ball.
on a batted ball the fielder has the right of way if the fielder is in the basepath and the ball isn't near him the runner has the right of way
if the fielder is a) in the baseline, and b) doesn't have the ball, then no. If the runner goes out of the baseline to strike the fielder, he is out for leaving the baseline. If the fielder has the ball, and as a result of the collision he tags the runner, then runner is out. If the fielder has the ball and is trying to tag the runner, but the collision knocks the ball loose, then the runner is out if the umpire felt the contact was intentional, but it is a loose/live ball if the contact was accidental or otherwise part of the game.
A fielder's choice is when a fielder has choosen to make an out on another runner on base when he could of gotten the batter/runner out instead. The batter/runner is safe, therefore reaching base via a fielder's choice. Please note that this counts as an at-bat and goes against the batter's batting average.
If it is a force (i.e. there are people on all the bases behind the runner) play, then yes, the baseman needs to touch the base to get the runner out. If the runner is not required to move to that base, then the baseman must tag the runner to get him out. The baseman does not NEED to touch the base to record the out. The defense may tag the runner OR the bag.
The runner is out as long as the fielder you touches has the ball in his glove
No. The runner would be called for interference if, for some reason, he ran into the fielder.