Inertia Investigation

Three instances that I have experienced inertia in my life have been;

-Kicking a rock; when I kicked the rock, it just moved a couple of inches because of the forve that had been exerted to it from my foot. Then it stopped, and didn't move anymore. This is inertia because as we might already know, anything that is at rest likes to stay at rest. 

-Playing soccer; one time I was playing soccer and I kicked the soccer ball to the goalie in order to make a goal, once I kicked the ball, it kept moving until it was stopped by the goalies' hands.

-Rollerblades; this one time while riding rollerblades, I was going by a hill, at this instance I was going faster and faster, until I used the brakes and they slowed down little by little.

Mu-Friction

I think friction happens because not all surfaces are flat/smooth. I think that one surface that has more friction with shoes is a muddy area. I don't think it's very easy to go through a muddy area with any kind of shoes mostly because it's not all flat, and the mud might contain small rocks that create an unstable and unflattened surface.

Free Body Diagrams

This picture represents an egg falling from a nest. The only force that is being applied on the egg is gravity, which attracts the egg to the center of the earth from its center of mass. The box represents the egg falling, and the arrow represents the force that is being put to the egg. The force shown is "Fg" which is gravitational force which represents gravity. This is the force that attracts everything to the center of the earth, but it's possible that it only occurs on earth.

Balanced and Unbalanced Forces

These two pictures demonstrate a balanced and unbalanced force while pulling a rope. In the image on top, there is a balanced force because there is an equal amount (300N and 300N) of pulling force from each side. On the other hand, the picture on the bottom is an unbalanced force because in one side there are 400N of force to the left and 300N of force to the right, if this was tu be subtracted we would be left with 100N more force to the left. Whig makes it unbalanced.

Vectors and Scalar

Scalar and Vector quantities are different because scalar has to do with speed and vector has to do with velocity. An example of scalar can be that I walked 8 meters. On the other hand, vector includes magnitudes, so an example of a vector can be I walked 8 meters East.

Four Forces

One of the forces is applied force. This force happens when force is applied to an object in matter of pushing or pulling.

For example: Everyday I pull my chair in order to sit down. My force is pulling the chair making it move. Another force is gravitational force. This force happens when there is no contact but two objects are attracted to each other. For example: I was holding a book with one hand, omce I opened it, the book fell in the floor. The book was being attracted to the center of the earth. A third force would be normal force. This force happens when something is holding an object and keepingit from reaching a lover level like the ground. For example: I hold a pencil in my hand. My hand is holding the pencil, and keeping it from falling to the ground. The last force, is tension force. This force happens when there is contact with ropes cables or something used to pull without having direct contact with an object. For example: I tied a string to the door and the other end I tied it on my nieces tooth, once I slammed the door her tooth came off. The door made tension force with my nieces tooth.

Guess Method

Guess Method is the methid used to solve complex physics problems.

G is for given, this is the first step. In this step, we have to identify what information that might be useful we can use to solve the problem given.

U is for unknown, this is the second step. In this step we have to identify what we are trying to solve. 

E is for equation, this is the third step. In this step, following to the second one according what we need to find we find the equation, soemthing that might help would be the magical triangle.

S is for substitute, this is the fourth step. In this step we substitute any variables in the equation for the information we were given for each term.

S is for solve, this is the fifth and final step. In this step we have to solve the equation for what the unknown information was.

Distance vs. Time Graphs

Today in class we used sensors that detected every movement. And we tried to match the graphs that were shown in the screen, which included moving an exact amount if distance in an exact amount of time, and match it as close as we could. I think that these graphs would be important for science class because if we're talking about distance and we want to graph it, we would also need the time to have an actual slope.

Distance vs. Displacement

Distance is how far the total amount the object or thing has gone. Displacement is how far away from the starting position something is. Today, I walked .5 miles to my school in the morning, and then walked .5 more miles in the afternoon to get back home, my total walking distance was 1 mile. Today I had borrowed a notebook from a student that seats 4 meters away from me, but then I had to pass to a student that was around 1 meter closer to the owner, at the end, the notebook had 3 meters of displacement.

Barbie Bungee Date Estimate

If I had about two meters drop of distance with 8 rubber bands, I think that the distance that the Barbie will reach with 10 rubber bands will be around 250 cm, if by each drop the distance would be 25 cm. Using that same pattern, if I had 20 rubber bands, the distance would be around 500 cm, which will be at least 5 meters. And probably the same process will follow with 30 rubber bands, there would be an estimate of around 750 cm, about 7.5 meters in total. This is because if for each rubber band there was a drop of 25 meters, and 25 times 30 would be 750 cm.

Metric Units

In Science Class we use the metric units because it's easier to identify and simplify than the english units. A dice, is 16 mm. Which means it's much smaller than a pencil, which is 14 cm, because centimeters are .01, and mm are .001. On the other hand, the front of my house is 10 feets long, using the english units, but if metric units are used, it would be 

0.003048 in km.

Estimanting Distances

The front of my house is about 18.5 meters. First, I got a long piece of ribbon, which was about .5 meters. Then, I started placing the ribbon in front of my house, until I had covered the whole front of my house. After, I multiplied how many times I had placed my ribbon by two, in irder to make each number a meter. I would say this is a reasonable estimate because it seems like a very close estimate to what the actually lenght of the front of my house is.

Reaction Time

Reaction time is the amount of time some people take to actually react to certain situation or signal. One example from my own life would be, this one day that I was on the car with my parents, my mom was texting, and the car in front of us had already hitted the brake because the light was red, but my mom took very long to realize, so she got really close to the car, and not until she heard that she had hitted the car in front of us, slightly, she reacted and noticed what had happened. Second time, I was riding my roller blades, and I saw that there was a crowd, but I forgot to stop and bumped into them, my reaction time was way off, mostly because I was on my phone. The third time, I was walking by the park with one of my friends, and some random kid was riding his scooter, he was coming my way, but since he was kind of distracted, he almost bunped into me, thank god I took action and moved away before anything had happened.