Summary 1st semester

This semester I've learned a lot. First of all I learned that I do not like to blog. Overall this calls has been interesting and pretty fun. There is a lot more labs than I expected but more homework than I expected also. This class is nothing that I expected it to be. I thought there was going to be a lot more equations and more note taking than activities. Another thing I learned is the many different scenarios physics can be used in. The different stories told in equations make the problems interesting and makes you think how it can actually be applied. The blogs also helped visualize the different in world physics scenarios we live through every day. The one thing I realized that was important in class was the tests. One test can majorly bring your grade down or bring your grade up. In the beginning of the class I hated it, on the first quiz and test I scored low and had a low grade for a while. How do I feel about it now, I still really hate it because there is so much other work we do and it feels like it is a waste of time when it doesn't make to big of a difference in your grade. I'm also not a very good test taker so most of my test scores are not very high. I posted this picture because it takes us back to the beginning. As you recall this is the first picture I posted when I talked about myself. This is because we're going back to the beginning to see how far I progressed from the start. Out of all the sciences I took since I got into this school, this class is my favorite. To me it makes the most sense and I can apply it more to real life situations than the other sciences. In BSCS we learned about DNA and things that composed are body, in chemistry we learned about atoms and molecules none of these items can we see with the naked eye. So far this class is going pretty good and I'm understanding most of the concepts and equations we have to do. I just wished that the tests and quizzes weren't graded so much. And one of the only PA assignments that I did not turn in on time was worth like four times the amount as usual so that kind of sucked and the blog is blocked during Sunday nights. Other than that this class is going by pretty good and one of my more interesting classes.

Egg Drop Lab

During class we did an egg drop lab. The objective of this lab was to make an object to protect an egg from a four story building drop. The rules were that we could not use parachutes and that we could not put anything on the ground level to land on. What I did for my design was to use a juice carton as the main capsule. In that was another capsule holding the egg, which was surrounded in cotton. On the bottom half of the carton was cut slits so that when it hid the ground, it would collapse and increase the impact time. On the bottom of that was a taped juice can (full). this was so the center of gravity was on the bottom and would drop straight. Our design did not work, this was because the object was too heavy and it did not the juice carton did not collapse enough. this could have been solved by having a bigger surface area and making something to collapse more.

Definition of Momentum

This unit is about momentum. Momentum is defined as inertia in motion. The units of momentum is kilograms meter per second. This can be represented as P. the law of conservation of momentum states that momentum cannot be created nor destroyed, it can only change forms. The equation for this is Pin= Pout. Meaning momentum in equals momentum  out. Impulse is the change in momentum. When to objects collide there are two types of collision elastic and inelastic. Elastic equations are bouncy and inelastic collisions are non bouncy or sticky. In class we did a lab for this with toy cars. We had a collision with velcro and a collision without velcro. From that we found that momentum was not lost in the collision. It was just transferred from one equation to another. Force is found by the change in momentum divided by the change in time.

Forces #3

Today I will be talking about force for the third time. Again force is defined as a push or a pull. Force is measured in newtons which kilograms meters per seconds squared. this time I will be focusing on Newton's third law. It states for every action there is an opposite and equal reaction, this law is also known as the action reaction. For example while you are on earth and you jump upward, the gravitational pull of the earth pushes you back down. Therefore the forces acted upon you are balanced. A balanced net force is a force that is in equilibrium so that it is not accelerating. We are able to show these time of equations with free body diagrams. This is resembled by a circle, being the object, and arrows which represent the forces being exerted on it.

Forces #2

A forces is defined as a push or a pull. Today I'm going to talk about interita. Inertia is defined as an objects's ability to continue in the state is in. Inertia is proportional to the object's mass. For example if a bowling ball was to roll compared to a marble, the bowling ball would have more inertia than the marble. Newton's first law is the law that deals with inertia. It states that an object in motion will tend to stay in motion unless acted upon by an outside, unbalanced force. The same thing goes for objects at rest. Objects at rest will tend to stay at rest unless acted upon by an outside unbalanced force. An example of this is friction and gravity. Nothing on earth goes on forever because friction and gravity exists.

Work

In class we are now working on "work" which is the change in energy. I took a picture of my speakers to display work. I chose this because it was unique and I don't think people realize what is happening to make sound. Something is working when it is working against a force. For instance if you were to just hold a book in one place it would not be considered work. Now if you were to move your arms up and down it would be work because it would be working against the gravitational pull. For the speaker scenario, the speakers don't look like there doing much but it is. When it makes noise and music the speakers work against air resistance which create different frequencies.