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@pattylight25-blog
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
You guys are doing a great thing, we are all praying for your well being and hard work.
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
You guys are doing a great thing, we are all praying for your well being and hard work.
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
You guys are doing a great thing, we are all praying for your well being and hard work.
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
You guys are doing a great thing, we are all praying for your well being and hard work.
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
You guys are doing a great thing, we are all praying for your well being and hard work.
After competing the lab report, machines I had never noticed became more and more apparent in my home. Things like ramps in front of the shed help do work, like storing a tractor, easier then they ever could be. Machines give us great advantages in the real world that we may not even notice.
That is true a simple lab like this could open your eyes to the other simple things that make our lives easier every day, things that we hadn't even noticed before. Without machines I'm not sure were we would be today.
Posting 1-7-12
Friday in class our test was postponed so it gave us another chance to review and become more familiar with the types of questions. The questions from the packet that we had to work were fairly hard and challenging, most being because i haven't done it in a while and need to become more used to solving for those types of equations. The covers a few different topics that require different types of equations, so most of the time it is that fact that is confusing. The test was moved to monday so it gave me more opportunity to prepare and become more familiar with the topics.
Posting 1-5-11
Today in class we talk a little bit more about some thermal energy topics and problems. We went over the homework from last night and did some more sample problems in groups. The problems weren't to difficult but the more conceptual questions seemed a bit more challenging. We also did some review for our test tomorrow. This test covers a verity of topics some including work, energy, kinetic and potential energy, and the work-energy theorem. The main optics cover work and power, kinetic and potential energy, conservation of mechanical energy and machines, along with some thermal energy concepts. This test is probably gong to be challenging.
Posting 1-4-12
Yesterday in class we bang to talk about thermal energy ad some of the things that it constitutes. For example thermal energy is total energy including both the potential and kinetic energy value. Because molecules in gas have KE and PE values, we are able to calculate the thermal energy value. We talked about temperature vs. heat content. How mass is directly related to heat content and thermal energy, the more the mass the more the thermal energy. Also temperature is not dependent on the number of particles in an object.
On Friday, we did a lab on the efficiency of a pulley. Concepts involved include:
Effort – The force supplied by the person using the machine
Resistance – The force which the machine applies to the load
Effort Distance – The distance which the person using the machine moves the machine
Resistance Distance – The distance which the machine moves the load.
Good posting, simple but gets the point across as to the factors of a pulley system and what they are called. Also the animation is good.
Posting 12-25-11
This picture just revisits topics stated in my last post, the different pulley systems that ar eased to decreased force need to move the object. These are just examples of how it can change. So basically, what this displays, and also what our group found out in the lab, is that as you increase the number of pulleys in the system you have to pull the string farther but there is a laser force need to move the object.
Posting 12-25-11
This is a video that is basically the same type of lab that our class did regarding machines, pulleys to be exact. This demonstrates these same concepts that a pulley system can reduce the amount of force needed to move an object. These various systems show the decrease in force needed as you increase the number of pulleys in a system.
Posting 12-25-11
Last class I can remember we were talking about a machine and what it is. A machine is a device that can increase the force applied and change the direction of a force. Levers, pulleys, and inclines are all examples of machines. So the work input = work output or Fd(i)=Fd(o).
Posting 12-15-11
in class today we talked about the law of conservation of energy, and this short video shows a demonstration where you cant get any more energy out of a system than you put in, because of the law of conservation of energy. it states energy cannot be created nor destroyed, it can be transformed from one to the other, but the total amount of energy never changes. Also the total energy of the system is dependent upon the sum of the kinetic energy and the potential energy of the system.And this is called total mechanical enrgy. We did a short problem with a roller coaster and different heights and energy values, but in the end we determined that energy was conserved.
Posting Wednesday 12-14-11
This picture is just displaying a few types of energy and some uses.
A diagram showign a biker biking up a hil and how he puts energy into the system by pedaling, and has kinetic energy, then reaches the top of the hill and maximizes his potential energy, then gets energy outas he rides to cruise down the hill in the form of kinetic energy.
Today in class we went over a few pages of questions in our regents review books that clarified some points about types of energy along with its calculations and conversions. A major but simply point that we made was the work is a scalar not a vector quantity. We associated different formulas and aspects of problems containing work done in the horizontal directions and work done int he vertical direction. We said that in the horizontal direction, friction matter where gravity does not. As opposed to in the vertical direction where only gravity and the final height matter, and not the means by which that object was raised to that height.
Posting Monday 12-12-11
Today in class we continued our discussion of potential vs. kinetic energy, which is shown in a very simple form in this picture. We also talked about chemical and gravitational potential energy. Potential energy is the energy pf position whereas kinetic is the energy of motion. And potential must refer to the relate position of two objects, where energy is in a stored state. in chemical energy that energy is stored in-between the bonds of molecules. Lastly with gravitational potential energy, represented by PEg, work is required to elevate the object. So, PEg = W = Fd, so PEg = mgh.
Posting 12-11-11
On friday we continued talking about power, work, and energy. We established that power = work done/ time interval. So power is the rate at which work is done or transformed into energy. Some equations showing this is p=W/t=(Fxd)/t. power is how fast work is done to turn it tint energy, which brought us into the next topic, Energy. "mechanical Energy" is a property of an object which enables it to do work, and energy is measure in Joules (J). There are many different types of energy, including kinetic energy. Lastly, we talked about kinetic energy which is the energy of motion, and depends on mass and velocity. KE=1/2mv^2.
