• entries
30
27
• views
1,300

## Momentum in Sports

The first point of sectional finals, we have serve. Ace. A couple more aces and a big serving run and we are now up 18-3. We end up winning the first set 25-6. 25-6. 25-6, in sectional finals, against Pittsford Sutherland. It is clear now who has the momentum moving forward.  The momentum from the first set carried us in the next two sets and we end up winning the match and sectional finals. In a sport, when a team has the "momentum" in the game, it means that they are the ones on the move and will be hard to slow down and stop. In physics, momentum is the product of mass and velocity, and the equation is p=mv. Therefore, as mass or velocity increases, so does momentum. Momentum is also a vector quantity, so it has a direction to go along with the magnitude. A change in momentum is the impulse which uses the equation J=Ft. It would take a large amount of force in a large time to create a big impulse or change in momentum. Last night, Sutherland started to create an impulse in the second and third set, but it wasn't enough to sway the momentum in their direction. Here's a video of the final point of the match last night!

## Oobleck: a non-Newtonian fluid

Most people have made oobleck at some point in their school career, whether it was in elementary school as a fun project or in high school to demonstrate physical properties.   How did oobleck get its name? From the Dr. Seuss book Bartholomew and the Oobleck.  This simple, non-Newtonian fluid made from a mix of cornstarch and water defies Newton's Law of Viscosity. Oobleck magically transforms (well, not magically, but it seems like it!) from a liquid to a solid with the slap of a hand, punch of a fist, or kick of a foot. Because of the shear-thickening behavior of oobleck, a greater applied force leads to a greater resisting force from the fluid and it behaving like a solid. Without an applied force, the oobleck will behave like a liquid. The behaviors of these shear-thickening fluids allow them to be used as body armor since they offer great flexibility and ease of movement, but would resist a sudden force such as a bullet or knife. Watch this video if you've ever wondered how to walk on a liquid:

## Ping Pong Physics

Anyone who knows me well knows that I’m a very competitive person and I love to play ping pong. I have a ping pong table in my basement and my friends and I used to have tournaments and we even had a rule where if one person got a shutout against someone else, the person that lost would have to pay them \$5 (this never actually happened because we would never go along with the rule if it did, it was just a joke we had). It also amazes me to watch table tennis on TV during the Olympics because they hit the ball so hard that I never knew how the person returning it doesn’t hit it off the table every time. Well, it turns out that this has to do with Newton’s first law, an object in motion will remain in motion unless acted on by an external force, and Newton’s third law, for every action there is an equal and opposite reaction. When the person serving hits the ball, the applied force is so great that the returner doesn’t have to add any force to the ball (neglecting air resistance) since the ball hits the paddle with the same force it started with and the action of the ball hitting the paddle causes the ball to change direction. However, air resistance is an external force acting on the ball causing it to slow down, so the player should plan to hit the ball with a small amount of force each time. The force of gravity causes the ball to hit the table on the opposing player’s side, therefore keeping the game in play until one player adds too much force, too little force, or misdirects the ball so that the ball goes off the table or into the net. Here's a cool video of the best table tennis point ever:

## How to Get the Most Out of Studying

Other than being a student at IHS, most of my free time is consumed by playing volleyball. I also make time somewhere in my busy day to do homework and sleep. I don't know where I want to go to college yet, however I am planning on a major involving cybersecurity/digital forensics and I'm also interested in engineering, which is one of the reasons why I decided to take AP Physics C this year. I also wanted to take physics again because I like both science and math and this class involves both of them. This year, I am excited to continue learning about physics and applying it to real life situations because this is one of the only classes where that applies. However, I'm nervous about trying to wrap my head around some of the theories again this year because I had trouble with that last year. I'm hoping to have a great year with a challenging but intriguing physics class!