The Week of March 22nd

If i went back in time I would help myself with power. Power has units of joules per second. It is measure in watts. To find power you divide work by time. Now we are able to be given facts and we can find power, work, and acceleration using a series scientific equations. The equations could look like mass times acceleration equals force, force times change in position equals work, and work divided by time equals power.

We learned this using the energy activities online. It gave us many problems and examples. It also explains equations and other things involving energy. Besides this we learned doing games and examples on the board with our class. We discussed in groups to further our understanding and worked in partners. We also had a couple quizes that we took with our table, which helped us get better grades on it.

This information will help us in the future because in a week we will be having a test on it and if I don't understand it I wont do well. Also when we learn a new subject I am sure this will come into play as we do new problems and activities.

There was no specific experiment we did on power. We mostly did situations and figured out power using different equations.

The Week Of March 1

Dear past self,

When you begin to do the unit of Energy you need to know how to decided what objects that are in a specific system. At first I wasnt very good at indentifying systems. Now it is easier for me because I know the following things:

1. A system is a group of things that work together to do a task. Therefore if there is an object that doesnt affect or take part in the system it isnt part of it.

2. Anything could be part of a system, not just the obvious things. For example if you are jumping on a trampoline the force of the earth pulling you down could be part of the system.

3. A System can not do work on itself, so there will always be an outside force that starts the system. This means when your are deciding what should be in the system do not incude the outside force.

Experiment- A helpful experiment that we did in class was about 6 students stood in a line with there arms locked out in front of them. Mr. Finley was behind us and he pushed us making the person at the end fall forward. In this experiment the students are the system and Mr. Finley is the outside force.

The picture is a representation of the experiment above. The dominoes are a system.