Because the heavier football player has a much higher momentum which is product of mass and velocity. To cancel the momentum of a heavier football player one must achieve the same momentum at impact. A lighter player can only do that by increasing his velocity.
Momentum = mass x velocity
If a football player weighed 100 Kg and was traveling at 5 m/s (11 miles per hour). A 50 Kg person would have to impact the heavier football player at a speed of 10 m/s (22 miles per hour) to cancel the inertia of the heavier football player.
As the heavier football player goes faster it becomes increasingly difficult to stop them. You can also take several lighter players by combining their mass to stop the forward momentum of the heavier football player.
A heavy football player is harder to stop because it has a greater momentum. In physics, momentum is equal to the mass of an object times its velocity. If a 50 kilogram kid and a 70 kilogram man were running at the same speed, the man would be harder to stop because he would have a greater momentum.
A rushing yard is an important statistic in a football game. It is defined as any yard that is covered by a football player running with the ball in his arms.
One of the statistics kept in football is rushing yards. A 'rushing title' basically means the same as 'who led the league in rushing yards'. The player that wins a 'rushing title' is the player 'who led the league in rushing yards'. Rushing yards are accrued when an offensive player advances the ball past the line of scrimmage without the aid of a forward pass.
Yes, he is the best rushing QB in the NFL.
Same time as tackle football, when a player gets in the end zone with the football, but usually its not a rushing touchdown in flag football.
Through the 2008 season, Peterson (Adrian, rushing) and Anderson (Willie, receiving).
Timmy Smith of the Washington Redskins with 204 rushing yards in Super Bowl XXII.
Obviously, it would be lighter without anything on, but if you find that being light is an importance, than you can buy some pads that are lighter, as well as cleats.
That is Joe Morris with 4,299 rushing yards between 1978-1981.
Edgerrin James (born August 1, 1978 in Immokalee) is a former American football player who played as a running back for the Indianapolis Colts, the Arizona Cardinals, and the Seattle Seahawks, between 1999 and 2009.He was a four-time Pro Bowler, and as of 2015, is the all-time career leader for the Indianapolis Colts in rushing attempts, rushing yards, and rushing touchdowns.
The Oldest football player in history of football is George Blanda.