Power

Power in physics is defined as the amount of energy consumed per unit.  The units used to measure power is in Watt.  Energy transfer can be used to do work, which concludes that power is the rate of which work is performed.  Power is the rate of doing work or the rate of using energy, which are numerically the same. If you do 100 joules of work in one second (using 100 joules of energy), the power is 100 watts. In this picture it shows me going up the stairs, the reason i chose this was because it relates very well to our lab that we had done recently.  It shows the power being used to go up the stairs using work.  To calculate the power precisely you must consider the factors of the height of each step, then also the amount of the stairs that i was climbing.  I would also have to consider my weight to consider the approximate amount of power.  That is most of the techniques to consider power and to find the right amount

Thanksgiving post

When we talk about what we are thankful about i think about family, friends and everything in-between , however when we talk about physics i am mainly thankful for gravity.  The reason why i feel gravity is so important first of all is because to me its like a stabilizer it keeps us on the ground and allows us not to float in the air.  When i think about gravity, the first thing that comes to my head is floating, and Newton's Theory.  In this picture this is just a picture of me jumping and landing showing the true nature of how gravity works and that you will always land.

Momentum

When we talk about momentum i always think about motion through mass and how momentum is key to movement as well.  To define momentum , All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion. The amount of momentum that an object has is dependent upon two variables: how much mass or stuff is moving and how fast the stuff is moving. Momentum depends upon the variables of mass and velocity In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. The picture that i have to present today is a picture of my friend when we were hitting on the courts.  If you watch you notice that momentum occurs when the force of the racket comes in contact with the tennis ball and all that force that was pushed through the racket is eventually on contact causes the force to transfer

Accelerating Forces

In my opinion when accelerating forces occur in front of me i think of the 2nd law of motion from Newton, out of the three laws created the 2nd one compares and contrast the most accurate about that situation.  To define the second law of motion from Sir Isaac it states "acceleration is directly proportional to the net force of an object, and that acceleration is inversely proportional to the mass of an object. The equation is Fnet=ma.  Giving us the equation to solve the acceleration of the specific force.  In this picture it shows a tennis ball rolling across the floor, notice this is a floor area that is not causing as much friction as many floors, this would allow a smoother surface and it will eventually accelerate throughout the duration it is rolling.

Newton's blogpost

When we talk about the newton's law of motion the first one is stated:  An object that is at rest will stay at rest unless an external force acts upon it.An object that is in motion will not change its velocity unless an external force acts upon it.  The second law is stated The relationship between an object's mass its acceleration and the applied force is F=ma.  Acceleration and the force are vectors in the law the direction of the force vector is the same as the direction of the acceleration vector.  Lastly the third law of motion states:  For every action  there is an equal and opposite reaction.  This helps us understand the concept of how balance occurs for the simple fact that opposite forces have to always be equal.  In this picture it shows the first law of newtons law of motion where this object is at rest, unless i move it or an outside, unbalance force acts upon it, the object will stay at rest

Projectile motion part: 3

SInce we are talking about projectile motion again we should always remind the fact that x-axis and y-axis are always in the relation of the motion.  We always need to understand how motion works due to gravity, and other factors that we always face in the world.  We also have to understand that the work we do we have to always find the Distance, Time, Acceleration, velocity, and original velocity for both the x and y axis because it helps us know the horizontal and vertical changes in motion.  In this picture my friend Marcel Chan is about to hit the tennis ball with topspin, when the ball is hit the ball's motion will be a parabolic motion and that shows a projectile motion and you will see increase in height or y-axis and the horizontal axis will move farther.

Projectile Motion

When we did our lab on the projectile motion of what would happen to shooting a ball out of a miniature cannon, we had to discuss the issues such as the projected length based on the angle and height of the cannon representation.  We discovered that we would have to use certain equations such as cos, sin and many others such as the regular equations we learned in class, including vat, dat, etc based on what would occur throughout the parabola. When we created the equations we also learned about how we have to start separate the x and y information due to the fact that they are dependent on two different axis.  That is what i learned about this chapter and section of projectile motion, including the fast slow stop fast slow motion we learned from the beginning.  In this picture it shows the water fountain coming into a parabola motion and how it occurs as a real life situation where you notice not just force from pressure but also gravity pulling it downwards on the y-axis.  When i watch and observed i saw the fast slow stop slow fast motion occuring over time.

Projectiles

When we talk about projectiles we talk about how movements works and how there is a x, y axis and how we find specifics by using our equations we have before only included the 2 factors of x and y depending on the situation and it helps us identify all variables, and get a better understanding of what we were missing variable.  This can really relate in real life to help us identify what we actually need to find and see.  In this photo it is a picture of me tossing a tennis ball, this relates to projectiles because it is the projectile itself and it also it causes you to look through the ball through acceleration and velocity.  Thus causing identity of y- axis and x-axis

A projectile is an object upon which the only force is gravity. Gravity acts to influence the vertical motion of the projectile, thus causing a vertical acceleration. The horizontal motion of the projectile is the result of the tendency of any object in motion to remain in motion at constant velocity. Due to the absence of horizontal forces, a projectile remains in motion with a constant horizontal velocity. Horizontal forces are not required to keep a projectile moving horizontally. The only force acting upon a projectile is gravity.  When we did our lab with the projectiles we had to create graphs that showed us the motions and all the things that occurred. In this picture it shows me the human being the projectile and how my downward force with gravity is pushing me down

Extra Credit Blog Post

In this photo i was sharing one of the many labs that we have and this was the pendulum lab and explaining the specifics and how things work though motion, and the different types of variables being shown because of the effects that have on the motion and time.  They found it astonishing due to the fact that they never learned this type of physics and didnt get exposed to these types of equations when they were in their respected high school.  They really wished that back then they had these equations to help them throughout all the problems and throughout the whole course of their physics class.  In the other picture it shows that my parents acknowledge and signed their signature and said they were there at my presentation to them

Final Blog Post

In Science we learned about many things in science, specifically physics.  We learned about the ways the Hawaiians, used their measurements since they did not have a set measurement as complex as ours now in the present.  We learned about the relationships and how it can be related when we reflect the relationship to the graphs and what are the different types of graphs that are in relations to the different types of scenarios.  We learned mostly about movement and kinematics, such as pendulum lab and how the way the movement moves based on many variables that change the situation, including time, space, angle and etc.  Kinematics we learned about how movement depends on the relation to what certain thing or object.  Included that we also talk about the displacement and acceleration/ velocity movements.  There are many equations that really helped me how to better understand and think clearly what is suppose to be defined or what are we trying to figure out.  These are the things i remembered and things that i really felt was the summarization of the whole unit

Blog #6 about me

My name is Justin Bac, i attend Kamehameha Schools, i am a junior.  My goal is to go into the University of Washington.  I intend to go into the engineering field.  My progress throughout this science course is going very nice and smoothly.  I understand the work is hard, however it allows me to prepare for the future when all the materials are intensified and much more harder. I am in Alg. 2B, that is my math course as of now.  When i complete this course i plan to be much more improved by the end of the year, and hopefully i can be able to be recommended for honors or AP physics. This picture is a picture  I took when i was in Big Island.  It is a picture of Akaka Falls, i feel this represents me because a waterfall keeps moving and doesn't stop.  My goal and dreams are set and i have to keep pushing and improving to reach my goals or else i won't.  I have to stay steady like the waterfall

Blog #5

On acceleration on this post we talk about speeds when going up or down and how much more importantly velocity always has to deal and coincide with each other.  In acceleration we talked about how when we toss a ball up it goes fast, slow, stop, slow fast.  This is what is in the picture shown here,  the reason i picked this picture and decided this idea was because when we learned about this i was very much intriqued so i decided to use a tennis ball and show how the acceleration goes in that same order.

Acceleration

When we talk about acceleration the first thing that comes to my head is faster and faster, in my opinion i assume Acceleration is just gaining momentum or speed over a period of time, however the true definition of acceleration is the rate at which velocity of body changes over time.  I learned that you can find different accelerations based on the type of object or type of resistance which really makes it interesting for me.  In this picture it shows me dropping a pen, it shows the acceleration because it invlove
velocity of the speed of the pen and the distance downwards to the floor.

Kinematics

When we talk about Kinematics and how everything in motion works with relativity, the first thing that comes to my head is displacement.  To me i feel it was interesting because whatever we may be doing throughout the whole day our displacement is back to zero when we come back to class or just wake up.  The reason why displacement is important in physics is because it shows the distance traveled, the starting and ending destination.  However for almost everyone you end up the same place from the beginning travel.  This picture shows me walking to my room to finish my homework.  However everyplace i go or anything i do i will always return back to my room because i have to finish my homework and also i sleep there.  In other words my displacement will always be zero due to the fact i will always return back to my room.

Post #2 motion

Motion and relativity have many things in common and are linked in many ways.  First we should define what motion is.  Motion is defined as the process of being changed in any position or place.  Next we have to help talk more about relativity, it apply's with motion because it makes you better understand which perspective is being taken.  For example of relativity from me to the table me being relative to the table i am not moving however vice versa in the perspective of the table i am moving.  This is why i put this picture of me being punched in the face.  This shows motion seeing as how i am literally getting punched in the face.  In relativity the fist to me its not moving, however from me being relative to the fist it is coming towards me and this shows the relation and how motion and relativity are entwined together.

definition source: http://www.thefreedictionary.com/motion

We covered the two topics of accuracy vs. Precision to notice the different definitions each one has.  For accuracy it is defined in our terms as the closest an object can be to the ideal goal.  While on the other hand Precision is how constant the object is being joined by one another.  In this picture it shows a dart board but not in the bullseye, However it does show precision, it has 3 darts on the board and they're not near the ideal target however they are constant in their distance between each other and all three of the darts are next to each other which defines our explanation of precision.