bdavis

This relationship is so simple yet so important to our overall understanding of physics relationships. You find the importance in simplicity! i commend you.

This is very true and i will keep this in mind because i am going to be ON this physics test!

i appreciate these because i can atleast understand them due to my immense bank of physics knowledge!

So far for me, Physics C has been a challenge. There is a lot of information to learn and a lot of abstract ideas that I have difficulty wrapping my head around. Despite the many difficulties, that i know most of my fellow classmates are experiencing simultaneously, i find this class extremely rewarding. I have learned so much not only about physics but how to properly study and learn complex information accurately and effectively. I also find the content very interesting. So many things happen all around us everyday and i find it very interesting that we can find out how and why things happen. I am a very inquisitive person so i value this information. However frustrated i may get with the difficulties, i know that nothing in life that is worth learning comes easy and properly studying is a skill i will take with me through my travels to higher education. So i am excited to continue this course into the next semester.

So far for me, Physics C has been a challenge. There is a lot of information to learn and a lot of abstract ideas that I have difficulty wrapping my head around. Despite the many difficulties, that i know most of my fellow classmates are experiencing simultaneously, i find this class extremely rewarding. I have learned so much not only about physics but how to properly study and learn complex information accurately and effectively. I also find the content very interesting. So many things happen all around us everyday and i find it very interesting that we can find out how and why things happen. I am a very inquisitive person so i value this information. However frustrated i may get with the difficulties, i know that nothing in life that is worth learning comes easy and properly studying is a skill i will take with me through my travels to higher education. So i am excited to continue this course into the next semester.

So when my family goes out to restaurants, my mom and i take the straws they give us, rip off the top part of the paper and shoot them at each other. We also make spitballs and fire them at each other at will before we receive our food. This relates to a lab we conducted in our Physics C class. We blew projectiles from straws and then blew those same projectiles through straws that are connected to other straws. Those projectiles traveled faster and farther. Velocity is calculated by dividing the displacement by the time the projectile traveled that certain distance. (V= (disp/time)) Also, the longer the straws were, the longer the constant force was applied to the projectile. The longer a force is applied on an object, the faster it will go and therefore the farther it will travel. That is how my mom and i make it interesting: we put many straws together to make the spitballs go faster at each other. Physics is clearly involved in even the most immature behaviors.

So lately, our physics C teacher has been making us to equation dumps at the beginning of each class. He would give us 4 minutes to write down as many equations as we could, thus seeing how much we had already memorized and how prepared we were for the upcoming exam. To put down as many equations in those 4 minutes not only requires raw knowledge but also strategy involving.... wait for it... PHYSICS!!!:apple: So, the goal in those 4 minutes was to write down 50 equations. That means you would have to average 12.5 equations per minute. That doesn't sound too bad but writing fast helps. Pressing down hard with the pencil increases the normal force which increases the force of friction, thus slowing down the speed at which you are writing your equations. (F=N(mew)) Friction also takes away energy that could be used to maintain a good pace. The work due to friction (w= Fdcos(180) = -Fd) can be minimized if you don't press down hard and lightly glaze over the paper, making sure your equations are down and that you still have enough energy to write more. Thus, you will attain an optimal number of equations, proving to yourself you are prepared if you know your equations. :banghead)

that is all i am saying

Last year, i was blow-drying my little sister's hair and when i put the blow-dryer into the outlet, i got shocked. When i inserted the plug into the outlet, i accidentally put my finger too close to where the circuit was completed. I then realized that i completed a circuit when i plugged in the hair dryer. I did a little more research. I found out that the voltage of an outlet in a home is 120 Volts. Then i did research to find out the resistance in the blow-dryer. The blow-dryer i used had a resistance of 6 ohms. Using the equation I= (V/R) (I being the current, V being the voltage, and R being the resistance in Ohms), i found out that i was shocked with 20 amps of current. I went further to calculate that the Power generated in that circuit, from the equation P=(I*V) was 2400 W of power. Curcuits can be simple or complicated and they can generate a lot of current and power. I am glad that i wasn't hurt because if the voltage was greater and the resistance was smaller, i could have been in quite the predicament.

During the AFC football game yesterday night, the wind was blowing really strong from one end of the field to the other. That can be a good and a bad thing for the offenses on each team. The offense driving into the wind will have their quarterback's passes subjected to the wind and his passes won't travel as far. But for the quarterback and his offense traveling the other way, his passes will be thrown with the wind, thus making his passes travel farther with the wind carrying them to some degree. The wind alters the magnitude of the drag force that the air puts on objects in calm conditions. The drag force is given by the equation F= bv or F= cv where b and c are constants of different magnitudes. The wind increases the drag force for the balls thrown into the wind but it decreases the drag force for the balls thrown with the wind. Although one team may have had the advantage for part of the game, the Baltimore ravens won and that is all that matters. Harbaugh superbowl!

One of the simplest baseball drills that only requires one person, a glove, a ball and a wall exhibits one of the basic yet essential physics concepts: Newtons third law. Newton's third law states that if something applies a force on an object, that object will apply a force of equal magnitude in the opposite direction. So when training for baseball, someone can throw a baseball against a wall with a certain force and the ball will come off the wall with the initial magnitude it first hit the wall with, but in the opposite direction. Newton's third law didn't take into account friction so the ball will be subjected to air resistance and won't make it back to the person with the same velocity but for the instances it strikes the wall and comes off the wall, air resistance is negligible. Therefore, Newton's third law can be observed.

Our bodies conduct physics every second of everyday. Our bodies pump blood. Initially, one may think that the mere action of pumping blood has no correlation with physics at all. On the contrary, the blood in our bodies must be pumped through muscle contraction and applied force as well as pressure. Last year in physics B, we learned quite a bit about fluid mechanics and the relationship between force, pressure and area of the tube the fluids travel through. As our heart initially pumps blood from the heart, it travels through the arteries in the downward direction towards the lower part of our bodies. Not as much energy and force needs to be applied because gravity provides a lot of the force needed to carry the blood through the arteries through the body. That is why the arteries are larger and do not apply as much pressure and force as the veins do. Veins are the other muscular passage way that carries blood but it carries blood back to the heart to be replenished with oxygen. The veins need to carry the blood from the bottom of the human body, against the pull of gravity, towards the heart. Therefore, in order to successfully transfer the blood to the heart, a force greater in magnitude than the force of gravity needs to be applied. F=(P/A) This relationship shows that a smaller area will increase the applied force. The contractions of the veins provide the required pressure and the smaller radius of the veins compared to that of the arteries creates a greater force. That force overcomes the force of gravity so the blood can be constantly circulated within the human body.

I aspire to be involved in the medical field once i finish my schooling and one of the tools i hope to use is a centrifuge. Centrifuges are tools where test tubes are inserted into spaces around the outside of the tool. It then spins in a circle and the more it spins, the contents in the beakers are separated into their components. The contents in these beakers mostly consist of blood samples and organelles that need to be separated to be analyzed. Centrifuges use the centripital force to separate the components of the samples. The more massive objects/ components in the test tubes experience the greatest force due to the direct relationship between the force and the mass (F= (mv^2)/r). They will be pushed back to the bottom of the test tubes and the fluids along with the less massive components will be on top of the larger organells. When the spinning process of the centrifuge is complete, the smaller and larger components of the sample in the test tubes will be separated. The centripital force incorporated by the Centrifuge is very helpful in allowing medical researchers analyze smaller components of human blood.

I concurr with this statement. i feel that understanding calculus has helped me to carry out and solve more difficult physics problems. Something we all should take pride in.

In our everyday world, mechanics that work with cars in autoshops work with a physics concept that we all know and love: Torque! Cars are working machines that are assembled by many parts and those parts are held together by bolts and screws and lug nuts. Tools such as wrenches and pliers allow mechanics to secure parts by putting the nuts and bolts on the car. Torque is equal to the applied force times the radius or length from the fulcrum of the object. (T= Fr) To ensure that a lug nut stays on the part of the car and stays there, a wrench should be used. To apply a greater torque, a longer wrench should be used when repairing a car. In an experimental setting, a mechanic may want to pick the best wrench to ensure that a lug nut is securely fastened on a part in the car. If he applies the same force to the end of each wrench, would he be better off using a 18 inch wrench or a 12 inch wrench? Well, the equation shows that if the force is kept constant, Torque is directly proportional to the length of the wrench. The longer the wrench, the greater the torque if the force is kept constant. So in the future, if a lug nut isn't staying properly fastened on your car, using a longer wrench may be very helpful.

Ever since i saw my first Jackie chan movie (which i cannot remember off the top of my head), i have always been curious how a man, not especially strong and bulky with the muscles most football players possess, can break a cinder block in half with his bare hands. I previously thought that the cinder block would be too strong for even the most muscular man to even crack it let alone break it. In this video, the person had two thick bricks stacked on top of each other and he broke both of them simultaneously with his bare hand. He put the very edges of the bricks on blocks so they would provide a very minimal normal force in the opposite direction of the applied force of the karate chop. Also, he aimed at the middle of the block with his applied force to where the center of mass had the greatest force in the downward direction provided by gravity. Therefore, when the man made contact with the block, the block was subjected to the force of gravity down and the applied force of his chop. With no reinforcement below the middle of the block, the person applying the force will feel a minimal normal force applied by the block itself. A very large force must be applied by the person chopping at the block but with the assistance of gravity and no reinforcement under the block, breaking a brick with bare hands is easier than it appears to be!

Wow that is a lot of energy that will be used and that will be one powerful experiment. I am now interested so i will be paying attention to the progress of this experiment!

maybe he can read your handwriting . But in all honesty this is really cool and that would be really helpful in understanding physics and calculus.

This sounds like a really wonderful excuse for late work. Your grammar sucks by the way but i respect your sound knowledge of Einstein's theory of relativity.

you definitely put a lot of thought into this and i respect your effort as well as your display of knowledge. the simple physics of typing and using a computer show how the objects we commonly use are so complex in their essences.

I can empathize with your anxiety. I too am nervous about all of the work involved and the difficulty about the content but even so far i think it is definitely manageable and like you said, it will be a valuable experience as we move on towards college.

I never thought of this and this opens my eyes to realizing the differing liquids that exist and the properties they may have that characterizes them differently. i commend you sir.

R u telling me that i should gain weight?

This is a phenomenon that i have been pondering since i saw a cat fall from a tree and land seemingly effortlessly on its feet. i like how you related it to angular momentum because it helped me to understand the remarkable movement cats display. I am in a state of awe regarding the cat.

I concure with you davidstack. professional players make the shot in such a quick and fluid motion but it is such a complex motion that takes time to get every muscle firing at the proper moment in time. Lining the shot up and releasing it at the optimal angle of trajectory takes great concentration and physics. If this immense pressure gets you too overwhelmed, i suggest you take up floor hockey at the JCC.