The Physics Prodigy

"Always do what you are afraid to do"-Ralph Emerson

[kingbonc-blog]

The pulley system explained, correlates with what we did in the lab on friday. 

[kingbonc-blog]

Machines

A device for increasing a force or changing the direction of a force. The work input=work output. Examples of machines are levers pulleys, and inclines. 

[kingbonc-blog]

I thought this was an interesting video because I received a concussion on the weekend. 

[kingbonc-blog]

Conservation of Energy

In a closed system, the sum of the potential, kinetic, and internal energy remains constant. The energy may be transformed from one type to another, but the total energy of the system always remains the same. The Law of Conservation of Energy states that energy cannot be created or destroyed. Therefore, the sum of the changes in energy within a closed system is zero. 

[kingbonc-blog]

Potential Energy

The energy possessed by an object due to its position or condition, if there is no energy lost due to friction the work done to bring the object to a different position or condition from its original position or condition is equal to the object's change in potential energy.The change in potential energy is equal to m x g x change in height. It is measured in Joules.

Gravitational Potential Energy

if an object, orginally on the earth's surface is lifted to a height, work is done against gravitational force. The work done is equal to the object's gravitational potential energy. If an object falls, work is done by gravity on the object and the object loses gravitational potential energy but increase the kinetic energy (speed). These can equal each other. 

[b-rhymez-blog]

Potential Energy and Kinetic Energy

Yesterday in class, I brought up the example of the bowling ball pendulum idea. The potential energy that’s stored in the ball at the beginning of the system while it’s not moving is equal to the kinetic energy of the ball when it is moving.  So does that mean PE = delta KE? You can use so many different equations now to solve problems!

[kingbonc-blog]

Your right Bobby the physics formulas are starting to become interconnected. 

[taylorgangorphysics-blog]

While this video is terribly boring, it gives a real life example of what we learned in class today. While we were calculating the value of our awesome and limitless strength, we were doing things that scientists actually do for many of the things we use on a regular basis- most notably transportation. This also puts into perspective the gravity (lol physics pun) of how awesome the engines in our cars are, some of which reach 400 horsepower on a regular basis; as well as how insane it is that Usain Bolt is legally classified a human being.

[kingbonc-blog]

The computer voice is quite funny and this just proves how much of a beast Usain Bolt is.

[kingbonc-blog]

Some serious work being done here hahahaha. 

[kingbonc-blog]

Great example of work now that the NBA season is finally going to start. Work is the force multiplied by the distance. Work is done only on an object that moves. If there is no movement then there is no work. Two conditions must occur for work: a force exerted on the object and the object moving a distance. There are two types of work: work done against another force moving against a opposing force and work done to change the velocity of something. No work is done on a frictionless surface and the force changes over time. 

[kingbonc-blog]

Today in class we did a lab on measuring the power production of each of the students. It was surprising to see how the weight of each person had an effect on their results whether or not they had a speed time. It was interesting to learn that I produced barely one horsepower and that this car produces 300 times the amount of myself. 

[kingbonc-blog]

Great real world examples of the conservation of momentum. 

[kingbonc-blog]

Conservation of Momentum

To accelerate an object, a net force must be exerted on it. To change the momentum of an object, an impulse must be exerted on it. The impulse must be something outside the system, no net force no momentum change. Once there is something outside the system there is no conservation. An elastic collision is when two objects collide and there is no energy loss. The objects may deform, but returns to its original shape. An inelastic collision is when two objects collide and mechanical energy is transformed into heat. The objects deform and do not return to original shape. 

[b-rhymez-blog]

So I was still a little confused about how a rocket moves in space, and I looked it up to see if I could find more information about it. This article helped a lot. Basically, the high pressure gas that’s released from the rocket causes the rocket to thrust in the opposite direction. This got me thinking about conservation of momentum. P initial = P final. Does that mean that the momentum of the high pressure gas is the same as the rocket? 

[kingbonc-blog]

Great article Bobby. We had discussed this in class and I was to lazy to ever look it up until i found it on my dashboard. A Studious Student Has Old Lessons to Learn Even though he think he may know.

[kingbonc-blog]

Today we continued the lesson of momentum. I learned for the same change in momentum there can be a large force for a short period of time or a small force for a long period of time. Also, when an object bounces, its impulse is greater. There is an impulse to bring the object to a stop and the impulse to throw it back. 

[kingbonc-blog]

As I was watching football today I saw somebody get laid out and wondered what the physics behind it was and i found this video. We had learned about collisions throughout the week and found this to be very interesting. 

[kingbonc-blog]

An elastic collision conserves kinetic energy and an inelastic collision loses kinetic energy. This photo really helps explain this.

[kingbonc-blog]

As I sat down eating turkey I wondered how roller coasters worked and came to the conclusion that is was probably simple physics and sure enough it was.Potential energy is stored as the cars are towed up the first incline, reaching a maximum as the car arrives at the top. As the car goes over the peak, gravity accelerates the car down the incline. This acceleration is a conversion of potential energy to kinetic energy, meaning that the car accelerates. The car gains speed and momentum as it rolls down the hill, and this built-up momentum is all that propels the car around the bends, loops, and twists that make riding a roller coaster an exciting experience.By the laws of conservation of energy and momentum, however, the total energy of the car cannot exceed the initial given energy. Hence, the first hill must always be the highest, and each subsequent hill cannot exceed the height of the one before it if the car is to successfully go over the peak.Furthermore, friction and other dissipative forces cause the car to constantly lose energy to its surroundings in the form of heat and sound, and this means that each hill must be strictly lower than preceding ones. The concept is similar to that of a ball rolling down a hill. As long as the overall incline of the hill is downward, the ball will continue to roll down, even if it encounters bumps that launch it upward at times.