AP Physics C:Mechanics

I took the AP Physics C:Mechanics exam last week, and it was a bit challenging, but I am pretty sure I passed ( for BYU that means get at least a 4 ). You see I had not studied it nearly as weel or as much or as enthusiastically as Calculus and I did not understand it as well and Calculus BC. The Physics exam had more than just math ( unlike the AP Calculus BC exam did ) it had theory and laws and you had to know how to solve the problems. Which luckily I did ( most of them ) but there were still some that had me a bit confused. The Free response especially , which had a whole question on the rolling motion of a ball , was confusing. But I believe that I wrote enough and got enough of the Multiple choice correct to get a 4.

The Exam is separated into two sections: multiple choice and free response , where the MC part has ~35 questions which you have to fill in a letter on a answer sheet, and the FR part has 3 questions where you have to write. You are given 45 minutes for both parts, and so an hour and a half for the whole exam. 

The Exam tests kinematics, forces and newtons laws, work and energy, linear momentum , impulse and center of mass, rotational motion, gravitation, and oscillations.

Kinematics deals mainly with the study of motion, how things move ( velocity, displacement, acceleration and the equations that relate these quantities and time ) and is only up to two-dimensional in AP Physics c mechanics with projectile motion. In this course both kinematics under constant acceleration and kinematics under varying acceleration are covered ,where in the first case the kinematic equations are used and in the second case calculus is used.

Forces and newtons laws deal with why objects move and the forces that make them move. The method of drawing free body diagrams and solving newtons second law equations (F=ma)  are covered as are the 3 laws ( inertia , F net = ma, action reaction pairs ). Inclined planes and force trigonometry is used to find components of forces in different directions. Different types of force, such as the normal force, the gravitational force, the frictional force and centripetal force are covered.

Linear Momentum is the mass of an object times its velocity or the integral of force with respect to time for varying forces. Impulse if equal to momentum as stated in the impulse-momentum theorem, and calculations are done on these equations. Conservation of linear momentum is covered and so are the different types of collisions ( elastic , inelastic and completely inelastic ). The method for calculating the center of mass of both a system of particles and a continuous body are also covered.

Work and energy deal with the integral of force with respect to distance ( for varying force), Mechanical , Potential , and Kinetic energy, potential energy graphs, conservation of mechanical energy, non conservative energy, basic gravitational and spring potential energy, work energy theorem , and power.

Rotational motion deals with the rotational analogous of the fore covered topics of kinematics and dynamics when rotating around a fixed axis ( so it can only rotate in two directions ), and how to solve problems with this. These include but are not limited to angular displacement , velocity, and acceleration, arc length , torque , rotational inertia, and rotational kinetic energy.

Gravitation deals with Kepler's 3 laws,Newtons law of gravity, actual gravitational acceleration, the equating of centripetal force and gravitational force for circular orbits, the finding of the gravitational force inside a sphere, the actual gravitational potential energy and the discovery of escape velocity, and the like

Oscillation deals with springs, the restoring force for simple harmonic motion, potential energy for springs, period and frequency, the model for sinusoidal simple harmonic motion of position, velocity and acceleration, pendulums and the simple harmonic motion equations for ones that are displaced a small angle of theta.

It is so awesome how newton discovered these laws that rule the motion of objects ! Our Heavenly Father loves it when we strive to find the truth and with his help we do. He helped me learn Physics and I am so thankful for this.

Recent learning and other things

Recent learning

Recent reading
Recently I have read the Hero's guide series. Book's 1,2 and 3. Here is some stuff about book 1: This series is made around making fun of Prince charming and some fairy tails. It changes them and combines them into an crazy and funny series. This book introduces the characters and tells us the real names of the prince's charming. Liam,Gustav,Duncan and Frederic. Liam is the Prince charming from Sleeping beauty, Gustav from Rapunzel, Duncan from snow white and Frederic from Cinderella.      

I also have been reading the Rangers apprentice series. Its a series placed in medieval fantasy land of Araluen, Scandia Teutland, Gallica , Temujai , Celtia and more.  These countries and people's probably are based on real modern day countries. Araluen probably being England ( I don't see any name reason here but i think it is england beacuse of the Longbows and some other things ) , Scandia most likely being Scandinavia( you can see the oblivious name reason here), Teutlandt probably Germany ( the name reason is probably from the Teutonic knights and Deutschland ,see how it ends with land? ), Gallica might be France ( Here it is most likely because of the Gauls )and Temujai ( I can not really see the name reason here besides it is Asian. But I think it is the mongols because the guy who started the Temujai  is called something close to Temuchin the name of Genghis khan and the leaders are called Shan close to Khan  ) the Mongols or the Huns or combined. But most likely the Mongols. The Main Character is will a young orphan at the starting and then finds out his Dad died bravely and strongly on the battle field. He lived in Castle Redmont as a ward. Wards lived In castle Redmont until they were 15 or so and then they could be chosen to be an apprentice to one of the craftmasters. Will had ward comrades: Horace, Jenny, Alyss and George. Horace got to be a Warrior apprentice , Jenny a cook apprentice, Alyss a Diplomat apprentice and George a scribe apprentice. But will , none of the official craftmasters wanted him. If no one would accept you as an apprentice you would have to go work as a farmer. But Will got excepted by Halt the fief's ( a place under control of a Baron and with his knights protected the Farmer. There were other Fief's and they all listened to the King of Arualen. This was where Will lived. The king's name was Duncan. ) Ranger. Rangers were a mystery to ordinary low ranking People. These people thought the did black magic. But what the Kings Rangers were and actually did was not his. The Rangers were an Elite scout team that were expert archers and knife throwers. They could spy on the enemy and see what they were doing. They were experts at moving without being seen and at tracking. Rangers were Rangers. They wore the Oak leaf to show that they were actual rangers. Bronze meant Apprentice and silver meant senior. Halt was a highly esteemed ranger he had lead the army when they beat Morgarath and evil villain. But he still existed. Anyway Will spent hour after hour day after day training with is Bow and knives. He also practiced Camouflage ( Rangers wore Ranger clocks , green and gray things ) keeping unseen, tracking and reading maps. Once Will , Halt, Horace and some Knights went Boar hunting. There were 2 boars but the y thought there was only one. After the first one had been killed the second dashed at Will. Will dived , Rolled , jumped and shot arrows at it. But this boar could not be killed unless an arrow hit his heart. Will missed every time and was just about to be killed when Halt shot it right in the heart killing it. After this Will went on to Kill a Kalkalra a (fearsome enemy that was only scared of fire . These Kalkara were enlisted by Morgarath the evil lord who goes on to almost beat the Araluen army with his army of Wargals. Also fearsome enemies ( their weakness being Calvary ) , but not as strong as the kalkara. These Kalkara were assassins . The hypnotized anyone close to them and then could kill them. ) by shooting a flaming arrow at it burning it. Will also burned a bridge that was vital to the Araluen win at the Plains of Uthal.

Below you can read some of the actual History.

Recent science
I have been learning a lot about chemistry. You can see half of some of the stuff I learned here here and here. I will be coming up with the second half soon with stuff about Biochemistry, pH ,acids, bases Nuclear chemistry and much more. I also have been learning some cool facts at Joppa flatts , like how to tell a green crab from an Asian shore crab,Sea stars have a brain at each foot, Sea urchins and sea stars are both Echinoderms (phylum) and are related and Moon snails eat other smaller snails called periwinkles by wrapping themselves around them, dropping acid , drilling a hole through them and sucking them up! Another cool fact is that sea stars eat with their stomachs. You can read more about Joppa flats in the Other things/joppa flats section of this post.

Fast fact! 
Saturn had the most moons, At least 25. While Venus has no moons.

Recent History and Recent Geography
History
I have not been doing much on History recently besides the world cup. I am going to publish the blog: Some History ( I changed World History since 1300 to this ), that includes The Huns,Vikings,Goths and Mongols; Early medieval Japan,Korea and China;Summary of the Story of the World 1,2,3 and 4 and more! Here are some sneak peaks.

Huns,Vikings,Goths and Mongols
here is a link to the downfall of Rome, I wrote last year, it has some information on the Huns and Goths.
 Huns:
 In the late 300's the Huns attacked Europe from western Asia, east of Europe. Eastern Europeans/Romans were terrified of them. The Huns raided and destroyed settlements. To make themselves even scarier than they were they slashed their faces( ouch ), And wore weird ragged clothes. The Huns were nomads ( people who moved from place to place always setting and taking down tents. They had no home. ) and expert horsemen.

#2 Rich leaders of the Huns wore jewelry to show they were rich. One jewelry item was the fibula , The Fibula was like a pin , it was usually made out of gold and had gems in them.

Vikings: 
The Vikings started in 793 and ended in 1066 ( this period is called the viking age ). The vikings came from Scandinavia, a region in Northern Europe that includes Norway,Denmark,Sweden and Finland ( not to many vikings in Finland though ). The Vikings were fearsome war crazy raiders. They were also explores( expert navigators) and amazing shipbuilders. The vikings traded,Explored,Raided and Colonized many places

Raiding and wars
The first viking raid ( outside Scandinavia ) was against England. England was raided by Vikings from Denmark. They raided a monastery called  St. Cuthbert's monastery off the eastern coast of England. The day it happened was the start of the viking age 7/19/793 AD.

Peaceful life and Exploration
 Back at home in Scandinavia they led mostly non warlike lives ( but they did fight and raid each other ever so often ). They lived in houses with large central rooms made out of wood. They had a hole in the roof for the smoke from a fire, that burned inside the house (  to give light for these houses rarely had windows. It was probably also used for cooking) to go out.


Goths:



Mongols:


Early medieval Japan,Korea and China

Around the 500's Japan was divided into many different clans. One of these Clans , the Yamato Clan, was stronger than the others. The Yamato clan wanted to conquer the other clans and rule Japan.



Geography
I have been doing postcrossing. In this you send and receive postcards to and from other countries. I have recieved 7 ( Germany, Australia, Canada, Russia, Finland and other places) post cards and have sent 5(Russia,China, Germany, USA, Belarus/Russia ). I also have been doing stack the states and stack the countries. I think we have beat them. I made a flag map some months ago, you can see it here.
Recent Math
I have been doing Khan academy for math here is an update for all the math I have been doing.

I put a progresses report here and it keeps going away

I am 3 skills away from mastering 5th grade. The recently added a lot of things for early math. This is preschool,kindergarten,1st grade and 2nd grade. You see though it shows that I have not mastered some of it. I don't think I should bother with things I already know and should keep learning( and believe me I know early math ).



Other Things


Joppa Flats
I recently joined the Joppa flatts staff as a volunteer. Here I clean caterpillar cages, Help people with crafts, Talk to them and help them hold creatures in the touch tank and other things. I like it there, I usually stay from around 9:00  to around  3:00. Then I come home. Joppa flats teaches you all about Sea creatures and many other things in science.



How to train your dragon 2
This was a great  movie minus a few things


Soccer



Recent art and Music

Sources: Barbarians, The story of the world voulume 4 and 3, Wikipedia, Myself, Khan academy and Rangers Apprentice and Brainpop