I'm a football manager/student trainer/watergirl and this friday as i was watching the game i realized that football is full of physics. When the quarterback throws the ball it's projectile motion. The projectile (the football) is going through 2 motions at once. It's going up & down (y)and from side to side (x). The football's y acceleration is always -9.8 m/s^2 because of gravity and its x acceleration in 0 (if there were no air resistance). The y velocity changes but the x velocity (ignoring air resistance) is constant. The x velocity has no effect of how long the football is in the air. The angle that the football is thrown in the air and y velocity determine how far it goes and how long it is in the air. In the picture to the left the word of life football player has been tackled and is falling at a rate of -9.8 m/s^2 and in the direction that hes being pulled down.

ohyeah & look at those cool girls in color :]

Yesterday i had a soccer game and i realized that kicking a soccer ball is related to a physics concept, Newton's first law of motion. Newton's first law of motion states that an object at rest stays at rest until an net external force acts upon it. It's also the same for an object in motion, the object will stay in motion moving at the same velocity until a net external force acts upon it. In this picture from last year's jv season im dribbling the ball propelling the ball forward. My foot acts as the net external force when i kick, trap, or redirect the ball. If i dont kick the ball it wont go anywhere and just stay at rest (0 m/s). If the ball is rolling (assuming no other net external force such as friction slows it down) it will keep rolling until i stop it.