No. If the defensive back hits a receiver before the ball is thrown it is Pass Interference (if the ball was already in the air) or Defensive Holding (if the ball hasn't been thrown yet). That said, the defensive back has as much right to the ball as the receiver, so if he is making a play on the ball the contact may be legal.
Not sure exactly what you're asking, but yes, you can knock a runner over by tripping into them. All it really takes is a hard shove, because a runner's feet rarely touch the ground at the same time.
Yes. NFHS Rule 9-2-5c. A player shall not clip except to tackle a runner or player pretending to be a runner.
No. Tripping by a blocker for the ball carrier or by a defender trying to tackle the ball carrier is illegal and is a 10 yard penalty.
It is legal to trip the ballcarrier. Rulebook definition: Tripping is the use of the lower leg or foot to obstruct an opponent, who is not the runner (ballcarrier), below the knee. If tripping occurs on an opponent other than the runner it is a 15 yard penalty.
When I played football, our coach taught us that we always watch the runner's (or qb's) hips, because that gives away what direction he'll run. Don't look at his legs, it will confuse you; look at the hips. Then you lean in that direction to make your tackle. So, you watch the runner's hips and lean that direction to tackle him.
No. With minor exceptions (e.g. a fielder with the ball can tag "out" a runner) baseball is NOT a contact sport. A catcher holding the ball and blocking off home plate CAN legally be barreled over by a runner attempting to score by knocking the ball out of the catchers hands but other than that, no there is no tackling in baseball.
tripping tripping tripping,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Suppose a runner covers a distance of 5322 feet in a 6 minutes and 11,531 feet in 13 minutes. So how much distance does the runner cover in 16 minutes?
yes
What to do while tripping
Nerves in your feet relay information about the position of the joints and also about the surface upon which you are walking. If this impaired the balance will be off and you will be subject to tripping.
It won't affect her feet but it will be difficult for her to walk in them. If her shoes are to big she may also be prone to tripping.