# Just Some Thoughts on Physics

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My AP Physics C blog that I wish had a better title. Here goes...

## Remember Scooters?

In Orchestra today, two kids rode past our room on their scooters. After discussing why two 8th graders were getting to school late, we started reminiscing about the scooter days. Remember those Razor scooters that hurt so much when they accidentally swung into your ankles? Yeah, those scooters. So I was one of the fortunate kids to have a scooter and one memory I have of it is the day I learned you must avoid, at all costs, scootering barefoot. Oh yes, bare feet and scooters are not a good comb

## Half Chaps

In the English style of riding, sometimes you may notice a rider wearing extra material around their calves. These are known as half chaps (I've included a picture below for better reference). Riders may choose to wear half chaps as a way get a better "feel" of the horse and keep your leg in the proper position. The coefficient of friction is increased by riding with half chaps as most have a grippy (for lack of a better term) fabric on at least the inside of your calf. The coefficient of fricti

## The Importance of Phone Cases

Since we have moved out of the era of brick phones and indestructible Nokias, and have entered the world of fragile iPhones, the market for good phone cases has widened greatly. Cases used to be just stylistic choice. Now they are almost necessary since you are investing hundreds of dollars into an iPhone (they are totally worth it though). How does the case work to prevent damage to your phone though?  When you drop your phone on a surface, the surface will act with an equal and opposite f

## Equestrian Physics

Physics is everywhere. There has never been a more true statement. So let me take a minute to discuss the physics involved in a sport that I love and are blessed to participate in: horseback riding. There are many different disciplines in the Equestrian world, but for the case of this blog, I'm going to focus on the discipline I am most familiar with, jumping. The physics behind jumping is basic kinematics. To clear a fence, the horse and rider have to approach the jump with the right velocity.

## First Physics Blog

Around school I'm probably known as "that really tall girl who rides horses" which is really a pretty accurate description of me. It does leave out some other things that are an essential part of who I am. I love the two classes I am the worst in: Physics and Math. I love history. AP European has been my favorite history class that I've taken so far, but I also enjoy learning about local history in my free time. I've been playing violin for almost 14 years now and play in my school's orchestra.

## Carpet Skiing

The other day, after gym class, a few of my friends (you know who you are... I'm just protecting your privacy) stopped by the locker of one of said friends. His locker is known for the large amounts of food that is kept in there. After emptying out a Capri-Sun* box and a box of Little Bites Muffins* someone had the brilliant idea to put one of the boxes on their feet. He tried skating around on one foot without much success. After meandering along the halls, I thought someone should try wearing

## Mini Golf

While Mini-Golfing with some friends on a trip to Cape Cod over summer vacation, I decided to take a video of a, surprisingly, challenging part of the course. It involved a loop that you could either hit your ball into or try to go around it. For most of us, we ended up hitting into the front part of the steel loop and getting our ball no where. None of us were really playing by the rules so we let each other have multiple shots until our ball finally went through/passed the loop. In preparation

## Tire Swings

On Easter, I had the pleasure of celebrating with a friends family (because all of my family lives in a land far, far away). Her cousins really liked playing on the tire swing they have in their yard. I don't blame them, tire swings are pretty swanky. For some reason they really liked when I pushed them. Maybe it was just because I was a new person that isn't family. Or, maybe it's because of physics. My friend and I, being the oldest kids there, ended up supervising after we ate Easter lunch. W

## Don't Drop The Eggs

... unless you are instructed to do so by your physics teacher My fellow blogger, zlessard, has also just posted a blog about a similar topic, as we both had to write one up for class. Our mistakes were different but we both had the same goal. The purpose of this lab was to figure out what height the arm on which the rubber band and egg were attached had to be so the bottom of the egg just touched the top of the paper (resting on a table) below it. To find out what height it needed to

## Popping Popcorn

Popcorn is a tasty snack that has existed for many centuries. The other day I was wondering how exactly it worked and figured there must be some physics behind it. After experiencing pressure created by the temperatures it is put under, the hull of the kernel splits and turns inside out. The water vapor that is released makes the popping noise. If you have ever made popcorn in a pot you will have seen that popcorn "jumps" in the air. I figured that the release of the water vapor directs a force

## Breaking CDs

A YouTube channel I enjoy to watch is that of The Slow Mo Guys. For those of you who aren't familiar with them, they film many different things- paint on speakers playing music, a bullet being shot through a pool of water, etc.- with high speed cameras that capture millions of frames per second. In one video, they spin a CD at 23,000 rpm (the critical spin rate of a CD)  at which it begins to shatter due to the extreme forces it feels at this high rpm. They catch all of this in slow motion makin

## Laundry Mishap

About a week ago, I walked down into the basement to check on my laundry only to find a large puddle of water on the floor. We had temporarily fixed the pump that brings the water from the basement up into the septic but it seemed to have broken again. We need pumps for appliances below our septic tanks because the water does not have the ability to move from low to high (high being the location of the septic tank; low, my basement) without an external system doing work on it. Because of gravity

## An Octopus' Garden

The title of this blog post is pretty irrelevant except for the fact that I will be talking about an octopus. The said octopus was won by a friend of mine for selling a bunch of a certain item for a class fundraiser (good job making those sales- woot woot!). The octopus was one of the gel forms that sticks pretty much anywhere. We threw it against the wall cabinet in the physics classroom and watched it stick for a short amount of time before it started to slide down. For a brief period of time

## What would happen if gravity pulled in the opposite direction?

In one of my late night musings, I asked myself, "Self, what would happen if gravity pulled us up towards the sky instead of down towards the ground?" and being a volleyball player, I wondered how that would affect the game. So let's create a situation to isolate some factors to get a better idea of what some possible outcomes would be. Let's say that, for this scenario, the court is the only area affected by the change in gravity. So the fans in the bleachers are seated and the coaches, players

## Dog and Cat Wars

I own two wonderful pets, a dog, Henry, and a cat, Willow. Let's just say they... tolerate each other. As my dog has gotten in to his elder years (He will be 11 this August), chasing the cat (she's turning 5 in June) has become less interesting to him. I've noticed on the days he does decide it's worth it to get up and run after her, she is able to turn the corner a lot faster than he is. I figured this must be because of her lower center of mass. She can turn at a lot higher speed without her l

## Cats Using Physics

I believe most living things are born with some a basic understanding of physics. If I jump up, I'll come back down. We certainly know gravity, as it effects us every moment we are on Earth. I'd like to share an example of this. Recently, as I worked on some homework I had, my cat jumped up on the table. She walked around on it, exploring, for a few minutes then went to jump down. I noticed she did not do anything other than simply sliding her front paws off, the rest of her following after grav

## Air Bags

Once upon a time, air bags were nonexistent. Now they are a standard feature in all new cars. This became a requirement for cars in 1998. When you get an accident at a high speed where the vehicle stops quickly, we know that the person inside wants to keep moving in the same direction at the same velocity as before the crash. Seat belts help to prevent the body from slamming into the wheel or flying out through the windshield. Your head can still fling forwards. The air bag deploys in order to s

## Driving in Snow

Yesterday, on the way home from a colleg interview, the weather conditions took a turn for the worse. Luckily, I was not alone, and my mom was able to drive home. What would have been a two and a half hour trip turned into four and a half hours because we had to drive at a much slower rate. We also had to leave a greater amount of space between the car in front of us. Because of how snowy the roads were, there was a greatly reduced coefficient of friction between our tires and the pavement. It t

## Getting "Left Behind"

On Saturdays I usually have a riding lesson, which is always the highlight of my weekend. On my drive home from the barn, I was reflecting on the lesson and what I could improve on for next week. The goal of riding is to make all your cues to your horse invisible and move with the horse as much as possible. Sometimes, after asking for a faster speed from their horse, a rider gets "left behind"- as the horse gets faster the rider doesn't move with the horse and look like they aren't moving togeth

## Mucking Stalls

More horsey physics!!! Horses are big animals and with that comes a lot of food that is consumed. Lots of food means lots coming out the other end. Mucking out stalls and pastures is a daily task for horse owners/stable workers. It's not a terrible task, honestly. It gets a bit tiring when you have 20 stalls to clean along with all the other tasks to do around the barn and wanting to ride for a couple of hours. Physics can make the job a little easier. It all comes down to torque. So you ha

## Christmas Candles

I don't know what it is, but I always seem to have candles burning a lot more frequently around Christmas time than any other time of year (which in my case means more than one time a day which is my norm). Maybe it's the whole lighting of the advent candles at church that influences me. Or maybe I'm a pyromaniac whose tenancies increase in December?? Either way, candles are very important to me and since physics is everywhere, it's definitely in candles! Let's start with the lighting of a

## Hiking is Phun!

I would like to start off by apologizing for the title. Sometimes I try to be punny and I should know by now I'm really bad at it.  Anyways... I was on spring break this week and a group of my friends (they're some really cool people) took a day trip where we found a pretty gnarly place to take a hike. It was a pretty awesome adventure and with any adventure, there has to be physics involved. We all hiked to the top of trail but, did we all do the same work? No! Why you ask? Because wo

## My Excuse for Being a Very Slow Sprinter

As mentioned in a few of my earlier blog posts, I am on my school's varsity volleyball team. Lots of the time, we have to do sprints across our thirty foot wide court as punishment for losing a drill or messing up too many times in row. I am always the last one to finish (it's absolutely terrible). Yes part of it is a lack of stamina, but the other day while running a very long set of sprints (we had to do 12 consecutive "down and backs" across our court), I was thinking about the physics and wh

## The Good Dinosuar

A few weeks ago, I went to see the movie The Good Dinosaur with some friends. It was a great movie and I definitely think that if you are reading this you should go see it. Since this is a blog about physics, let's talk about that! As the movie begins, a asteroid gets dislodged from the asteroid belt between Mars and Jupiter. This asteroid starts moving directly towards Earth. As it gets closer to Earth, it enters the Earth's Gravitational Field. It bursts into flames as it enters Earth's a

## Apples and Buses

A few days ago, my volleyball team traveled to another school for a match (which we won, even with the touch I called myself on that could have scored us the winning point if I hadn't) and for our trip home, the opposing team gave us a huge bag of apples. So as we rode the bus home we ate and then we had 15 apple cores and no idea what to do with them for the rest of our 45 minute bus ride home. An open window sparked an idea and with that I became the center for the discard of our apple cores.

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