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## Top Three Things you want to memorize for a phyiscs test!

3)MOMENTS OF INERTIA. These simple equations are a pain in the butt and stop you short of a point or two on a question if you don't know them. [ATTACH=CONFIG]584[/ATTACH] 2)DERIVATIVE RELATIONSHIPS. Enough said. These relationships come in handy on all graphing questions and can pick up points on the questions that are specific to derivatives. a = dv/dt v=dx/dt I = integra(mr^2) and so on... 1)KINEMATICS EQUATIONS. They are everywhere. EVERYWHERE. Those who know when to appropriately

## net F = MA

As simple as this equation seems, it is a staple in mechanics. It has many different applications. These uses vary from setting up equations to find tensions to simply finding the net force of an object in motion. It is 0 when an object is in constant velocity or when the system is in static equilibrium. Then, when we convert the quantities into rotational motion, and we get net Torque = I(alpha). For an equation that seems very simple and easy to apply, there exist tricky problems that require

## Freeride Snowboarding (Snowboarding pt. 2)

The other form of snowboarding is called Freeride. It focuses on going fast and carving your own trails out of a mountain. Although I upgraded my board to increase my rotational velocity, I sacrificed my ability to carve at speed. The edges of a snowboard are metal, and allow the snowboarder to apply a resistive force using their legs and friction to slow down their body. In this case, a longer snowboard would provide for a more stable ride because the force is applied over a larger area. This r

## Freestyle Snowboarding (Snowboarding pt. 1)

There are two categories of snowboarding: Freestyle and Freeride. I fit more into the freestyle category, but i wasn't always. Two years ago, i started snowboarding recreationally. Seeing all of the kids doing impressive tricks on their boards, I wanted to try my hand at the sport. However, I found rotation to be very difficult for me, and i could see why: with my big feet, I could only rent a large board. In any case, angular momentum is conserved, but with a really large moment of inertia

## Luke's Patented 5 Steps to a 5 (TM)

Here are my top 5 tips to performing the best possible: 5) TARGET THE UNITS IN WHICH YOU PERFORMED POORLY ON TESTS. If you aced that rotational motion test or blew through the early dynamics tests, odds are you don't need to prioritize your study sessions around them. Focus on the tough stuff that you know you could use the extra points for. Getting those extra points that few students usually get will boost a 3 to a 4 and a 4 to a 5 4) DO EVERY PRACTICE QUESTION POSSIBLE. Each released AP

## Friction

Friction is a pain in the butt when we look at kinematics problems. It is the main non-conservative force, meaning that it changes the total energy in the system. When fining net force or total energy, friction is always a tricky negative sitting in the dark to take points away from innocent physics students. The statement "if friction is negligible" yields an instantaneous sigh of relief, since our job just became that much easier. So why should the universe have friction at all? Well, with no

## Quarter 1: A Recap

Okay, here's my thoughts on physics C so far: Although the tests are challenging, we are more than prepared for them, and maintaining the difficulty will make the AP test at the end of the year That much more accessible. I enjoy the fact that we expand in every direction the fundamentals we developed in physics B. In this way, the concepts are not too challenging , and the calculus application fits into past knowledge quite nicely. In fact, the calculus problems we are given are actually easi

## Sound

In Washington DC, there is a building with very interesting sound diffraction patterns and design. Sound travels in waves in straight lines until they reflect , get absorbed by, or refract off of a medium. This room was designed with bipartisanism in mind. The desks were set up so that sound would interfere with itself so that opposite members of congress could not hear what they were saying. However, the architect overlooked basic resonance, since the arches were placed just right so that membe

## Physics Problem

I have a phun physics problem for you guys to try out! A 5 kilogram ball is being lifted up. It's potential energy is increasing at a rate of 3.5 Joules per second. What is it's velocity at t = 15 seconds? (HINT: You might find implicit differentiation helpful... Sorry non-BC kids)

## Physics and Speeding

As I am driving my car "55" miles per hour on the highway, I throw a baseball "55" miles per hour in the opposite direction. Amazingly, the creepy man standing on the side of the highway watched the ball fall straight down. Since the velocities are equal and mass doesn't change, there is no net momentum, and therefore no net force in the x direction so the ball will only be affected by gravity acting straight down. Likewise, if I threw the ball 45 mph, the creepy guy would actually see it travel

## More Physics, More Baseball

When I was in the 8th grade, I always dreamt of taking physics in high school. Unfortunately, my motives at the time were somewhat naive; I used to think that a physics background would allow me to never miss-throw a baseball again. With a handy protractor, I believed that I could throw a baseball any distance I desired with little effort as long as I threw it at the perfect angle. Physics has since crushed this dream: the ball will only have a finite amount of time in the air, based on the comp

## The Laser Lab: What I did this Summer

This summer, I worked under the tutelage of Wade Bittle and Dr Steven Craxton at the university of Rochester. I worked on a project called Dewpoint calculation using flow transducers. The preliminary time at the internship was spent gaining a basic knowledge of integration, and learning about the omega lasers functions and work schedule. Although we never got to see a shot (a single blast would vaporize our corneas) we had a good understanding of the process going on. When fusion occurs, there i

## The Wonderful World of Quanta

Hello, physics students! Lately I have taken an interest in quantum mechanics, in an attempt to improve my grade, but mostly because it is a truely stupefying. It still amazes me that briliant minds like Boltzman, Heisenberg, Euler, among countless others could possibly explain entities that they could "easily" touch but never physically see. Today, I want to give a brief background on the foundation of Quantum Physics: The uncertainty principle. It is this equation that gave Werner Heisenberg c

## My First Blog

Hello world! It is a pleasure to make your aquaintence. I have taken a liking to physics since I took AP physics B. Assuming that we are all nerds, I would guess that this statement would be common (we're all making a blog post on a physics site, arent we?) I am strong in logical reasoning and arithmetic, and would like to improve my test-taking skills throughout the course. I am taking AP-C to further my experience in the field to prepare for college and future work. I can't wait to use calc

## Relativistic Baseball

Just in case any of you were wondering, this is what would happen to a baseball if a pitcher could approach the speed of light! http://what-if.xkcd.com/1/ [ATTACH=CONFIG]479[/ATTACH]

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