Physics Of Sports Video

For our physics of sports video, we chose lacrosse, a sport I play. It is our second project of the year. Me and my group decided to do lacrosse for our sport. The assignment was to make a video based on a certain action in a sport, my group chose a goal. I have played lacrosse for 3 years and was excited to work with my friends to make a video demonstrating it. We started by creating a plan for what videos we needed to take, and how we were going to lay out the video. We then went to a field and took multiple videos of me shooting goals as well as videos of the actions I performed before shooting, such as footwork and the angling of my stick.

The Plan:

(The script) 

The Video:

Calculations:

Physics Concepts:

Force of Impact- The force of impact is the force that is acting on objects whenever they collide with something, such as a car crash. The force of impact on an object can be calculated with this equation: (Change in Velocity/ Change in Time x 2) times Mass. The force of impact on the ball we threw was 37.2N, or 13 lbs of force.

Horizontal Velocity- Horizontal velocity is the speed in the direction of an object on a horizontal plane. Horizontal velocity can be calculated by dividing the horizontal displacement, or distance an object has traveled from the starting point, by the time. The horizontal velocity for the rise of the ball was calculated at 1.47 m/s, and the horizontal velocity for the fall of the ball was calculated to be 4.41 m/s.

Vertical Velocity- Vertical velocity, or Vv, is speed in the direction of an object on a vertical plane. Vv can be found by finding the object's initial velocity and adding the time it took to fall x the acceleration of gravity. We calculated the Vv of the ball to be 20 m/s. 

Total Velocity- This is the measure of the velocity of an object when combining 2 or more relative velocities. If you are familiar with Geometry, this is like the Pythagorean Theorem and uses the same equation setup. The equation to find this is Vh²+Vv²=Vtotal. The total velocity of our ball was 20.48 m/s. 

Transfer of Momentum- The transfer of momentum is the amount of momentum transferred from one particle to another during a collision or interaction. The equation to find the transfer of momentum is m1v1 + m2v2 = m1v1 '+ m2v2 '. The transfer of momentum from the body to the stick to the ball was calculated to be 8.27 m/s.