Josh C blog 11/29

We all worked on the bar chart packets. You should be able to read a problem and know how to make a proper bar chart representing that problem. make sure you label properly and know how to read it. in the packet, the K stands for Kinetic energy, the Ug stands for Gravitational Potential energy, the Us stands for Elastic Potential energy, the i stands for initial state, the f stands for final state, and the W stands for work. Making bar charts is an easy way to show a problem and understand it better.

November 28th, 2010 Working On Bar Charts

On Wednesday in class, we continued working on our real-life situation money, energy, and food bar chart packets. For each of the questions in the packets we had to come up with a bar chart that shows the initial state, a process, and a final state. These bar charts helped us to see what was going on over time and to compare initial and final states of the situation.

In my case, Yolanda, Yuji, Katie, and I were working on the energy packet. So our first question had to do with a girl on an elevator. She was on the bottom floor, she stepped inside the elevator and went up to the fourth floor. For this question my group had to draw a bar chart that had the initial energy, the process/work, and the final state. So our initial state was the energy that the elevator had on the bottom floor, which was zero jewels. Our process/work was the elevator going upwards. This involved an increase in both kinetic and gravitational potential energy. For the final states we had to include the increase in both types of energy. That's all there is to a bar chart.

The one area that I got tripped up on is the process portion of the chart. After working through the packet, I realized that the process is really just the work being done. Also, you don't have to include all of the types of energy, just the type that you're using because I included every type of energy we learned about when I only needed 2.

KS

November 23, 2010 - Raising the Bar

Today we were working on a packet entitled "Lesson 4: Raising the Bar". In this packet, it contained bar graphs dealing with real life problems, with money. "We can use charts to represent data by showing things happening over time, comparing, and contrasting.

But the idea is that the 'money' is doing work. There is an initial state, and a final state. For example, look at the graph at the top.

It show that there is a change in the initial and final. Compare this to being work; there can be positive or negative work. If the amount of money you're spending/taking away, that would be the 'negative work'. If the amount of money you're earning, that would be the 'positive work'. By showing the initial and final states, you put the before chart next to the after chart.

Now, think about how this is like doing work. Leave a comment if you want on how I can improve or what not, thans :]

CP

Monday, November 22, 2010

Today in class the first thing we did was switch seats. Then we split up into the Advanced and Regular track groups. The Advanced track went over the homework from a couple nights ago with the elevator problems. We discussed the answers to the problems. Most of them involved using the Work = Force * Displacement equation. Finley also told us that the displacement has to always be measured using the metric system. While we were doing this the Regular track was doing bar chart equations. After the Advanced track finished going over the homework we joined the Regular track and started to work on some of the Bar Chart questions.

Some of the questions we had to answer were how are Bar Charts used and my group said that they can easy represent data and clearly see the results. Another question was what does it show and we said it showed in our case money being transferred from one account to the other. The rest of the packet was pretty much just making Bar Charts. Here is a picture of what a bar chart looks like:

KM

None

No blog today, calendar pushed back a day. Took a "POP" quiz today. From now on, you can't correct questions that you left blank on your quizzes.

DB

Procceses

In class today, we discussed a process. Ex. $35 -> spend-> $25. Mr. Finley showed what a process was with money. He had $10 in his wallet, $20 on a gift card, and $5 in a hole in a ground. Also, he showed us how we can represent a process with a bar graph. Next, Mr. Finley checked our homework.

Our homework was to draw the initial and final state of someone lifting a box from the ground onto a table. He said that we should draw the very beginning and the very end for the initial and final state. When the box is on the ground, it has no energy. When it is on the table, the box has some energy. For the third part, the transformation was positive work to gravitational potential energy. For part D, Eugenia has to apply negative work to put the box on the table.

Next, we did a packet in our groups. The first question was, "How can we use charts to represent data?" My group's answer was that we can graph the data on the chart. The next question was to create a graph that shows you have $20 on a gift card, $0 in your pocket, and $60 in your bank account. Next, we had to graph if we take $20 out of the bank and put it in our pocket.

POP QUIZ TOMORROW!!!!!!!!

TR

Mechanical Energies November 16, 2010

In class, we were given whiteboards a

nd told to write the systems for the following situations:

1. A person is being dragged across a rug.

2. A hot air balloon rising up into the air.

3. Someone bouncing on a pogo stick.

4. A car going faster and faster.

The answers we came up with in our class discussion we

re:

#1 the system was the earth, person being dragged, and the rug.

#2 the system was the earth, hot air balloon.

#3 the system was the pogo stick.

#4 the system was the car.

Next we had to find the equation for work and what the negative signs means using the table

The equation is force * displacement = work

The negative sign means that you are applying a lot of opposite force.

After we did this we compared answers with two other groups. Our answers all agreed with each other.

Then we had to fill in this table.

Today in class I learned much more about systems because that was a topic that was a little confusing for me. I hope this blog helped teach you more about systems and mechanical energies.

-JM