Presentation on theme: "BY: Ian Ramdeen, Chris, David, Evan Harrison, and Brent Richardson"— Presentation transcript:
1 BY: Ian Ramdeen, Chris, David, Evan Harrison, and Brent Richardson Physics and FootballBY: Ian Ramdeen, Chris, David, Evan Harrison, and Brent Richardson
2 FootballAmerican football is obviously popular in the U.S., especially in the South.Did you know that physics can also be found in football such as a football being a projectile, momentum of a player, force applied in a tackle, and forces used in a kick?
3 Projectile in football A projectile is any object that can be thrown.In football quarterbacks throw the football for several miles at quick speeds. If a quarterback wants to throw a long pass, then he is going to have to throw at the right angle and right velocity.
4 Practice ProblemIf a quarterback throws a football at 20m/s and at an angle of 60 degrees, how far did he throw the ball?Formula: R=Vo^2 sin (2 theta)/gTheta=60 degrees V=20m/s G=9.8m/s^2Solve for RSolution: R=20^2 sin (2*60)/9.8400sin(120)/(9.8)= meters
5 Physics ProblemIf the same qb throws a football at 25m/s and at an angle of 50 degrees, how far did he throw the ball?Solution: R=25^2sin2(50)/9.863 yards. Wow! What an impressive throw! He gets my MVP vote.
6 MomentumEveryone knows that momentum is a measure that is equal to mass times velocity.This applies to football in this manner because football players of different sizes are running at fast velocities.
7 Physics ProblemIf a 125 kg (275 lb) lineman is running down the field at 9.8 m/s, what is his momentum.Formula: p=mvM=125 kg v=9.8 m/sFind p (momentum)Solution: p=125 (9.8 m/s)=1225 kg-m/s
8 New ProblemIf this same lineman runs at 7.5 m/s, what is his momentum?Solution: 125(7.5)=937.5 kg-m/s
9 Tacking and ImpactOne of the biggest concepts of physics applied to football is force. A force of a tackle can have huge impacts. If the impact of the tackle is huge, that can lead to a serious injury. If a running back is running with a huge momentum, a sudden tackle can come as a huge shock.(Rolando McClain gave this player a huge shock with this strong tackle).
10 Physics ProblemIf a running back has a momentum of 950 kg-m/s, and the tackle occurs in .6 seconds, what would the force of the tackle be?Formula: F=impulse/tImpulse (Momentum but written as impulse in this case): 950 kg-m/st=.6 secondsFind the ForceSolution: F=(950 kg-m/s)/ (.6seconds)=1583 N
11 New ProblemIf McClain tackles former Auburn running back Ben Tate in .4 seconds, and his momentum is 1000 kg-m/s, what is the force?Solution: F=1000/.4=2500N
12 Physics and kickingPhysics especially applies to the instance when a placekicker is trying to make a field goal. He has to make adjustments in order to make the attempt. He has to kick the ball at the right angle and has to kick the ball with a good force. He also needs to kick the ball well, so a good acceleration will enable the ball to go through the goal post. A good time while the ball is in the air enables the ball to go through the goal post.
13 Physics ProblemA place kicker must kick a football from a point 40 m from the goal and clear the crossbar 3.05 m high, and the ball leaves the ground with a speed of 25 m/s at an angle of 50 degrees to the horizontal at an acceleration of 9.8 m/s. How long does the ball stay in the air?Formula: D=ViT+(1/2)A(T^2)Given Vi=25m/s A=9.8 m/s D=40m T=?40=25(T)+1/2(9.8)(T^2)4.9(T^2)+25T-40=0 (multiply each side by 10)40=25(T)+4.9(T^2) =-250 +/- the square root of divided by 98 seconds.