Energy, Energy, Energy

Chemical energy is the potential of a chemical substance to change through a chemical reaction into another form of energy. Breaking or making of chemical bonds involves energy which may be either absorbed or evolved from a chemical system.

Gravitational Potential Energy 
For all objects on earth has gravitational potential energy because of gravity. When gravity pull an object down to earth there is PE stored within the object.

PE = mgh (Potential Energy= mass X gravity X height)

Elastic Potential Energy
The Energy is stored within an object when it is stretch and when the object goes back to rest the energy is released

PE spring = 1/2K X2

Mechanical Kinetic Energy 
The energy transformed from other sources such as chemical and potential is changed to kinetic energy when there motion. Mechanical energy can be both kinetic or potential energy. In other words, mechanical energy can be  from motion or it height.

Thermal Energy 
Is the part of the average temperature of a system or sample of matter that results in the change of a system's temperature. The internal energy, also often called the thermodynamic energy means that the energy is stored in the molecular structure. As temperature increase so does the electron's velocity vise verse when temperature decrease so does the electron's velocity.


Sound Energy
Ever wonder way when a force hit a surface there noise or sound coming from it? This is because sound energy is the energy produced by vibrations traveling through a medium, often the surface of something or even air.

321 fire

Best angle:
the best angle would be 45 degree to insure the maximum hang-time


Tight Sealing:
The cans has to be tape securely because of the potential danger of the fuel escaping thus fire then a footprint.

Mass of the base:
The mass of the base has to be as heavy as possible, because the force from the launch will have a opposite reaction (newton's 3rd law). it would be the best interest of our future if we do not misfire and hit someone.

Up Down then a Loop, its a rollercoaster

In kinematics, we learn about the displacement, velocity, and acceleration. All of these variables help measure/find the distance, speed and acceleration of a object aka the roller coaster.
  
However also take in to conclusion Newton's 3 laws

Newton's first law: All objects will remain in a state of rest or continue to move with a constant velocity unless acted upon by an unbalanced force.

Newton's second law: The acceleration of an object depends inversely on its mass and directly on the unbalanced force applied to it.

Newton's third law:  For every action force, there is an equal and opposite reaction force. 

2 of the coolest coasters are ( I wish to ride them one day)

Underwater Roller Coaster

Vanish roller coaster at Cosmo Land in Japan unexpectedly dives into an underwater tunnel.

Kingda Ka Roller Coaster

Located at Six Flags Great Adventure in New Jersey, it is the tallest and fastest roller coaster in the world. The train is launched by a hydraulic launch mechanism to 128 miles per hour (206 km/h) in 3.5 seconds.

vectors (but its not for math)

thing you need to know for solving vectors

When going in one direction then going to the opposite cancels each other. 

Example: you walk 5 m north then you walk 10 m south : position your 5m south

Wait wait wait that happen when you walk diagonally (basically a shortcut), think this through for a shortcut there has to be a long way right. that "shortcut" is the hypotenuse of a x and y

then is just simple SquareRoot (x2+y2)

find the adj and opp

adj = hyp*cosAngle

opp = hyp*sinAngle

opp & adj is similar to x & y

Find the hypotenuse then it angle would be opp/adj tan-1  or adj/opp tan-1  

Twin graphs?

Getting ( d=v2t+1/2at² ) Equation Number 3 from a v-t graph
 you need the 2 main equations. the "mother" and the "father"
The area of the Triangle can be calculated using -----> d=1/2(v2-v1)t 
                       Rectangle can be calculated using ---> d=v2t


Combine the two ---> d=v2t + 1/2t (v1 - v2)t <-------- (-_-)
 
a=(v2-v1) / t or at=V2-v1 <--------- (^_^)

                                             Sub (^_^) into (-_-) to form 

                                             d=1/2t(v2-v1)+v2t

                                               =1/2t(at)+v2t

                                               =v2t + 1/2at²

 

 

 

The area of the Triangle can be 

                                calculated using -----> d=1/2(v2-v1)t 

Large Rectangle can be calculated using ---> d=v2t

Therefore the imagery triangle minus the large Rectangle 

 

        d=V1t-1/2t(v2-v1)

         =V1t-1/2t(at)

                                                                     =v1t - 1/2at²

 

Matching graphs

You stay as 1m for 1 second then you walk at constant pace for 2 seconds way from origin then toward the origin for 1s then stop at 1.7-1.8m. [1]

start at 3m then you walk at constant pace for 3 second; stop at 1.5m for 1s, sprint to the origin for  second, stop at 0.5m for 2s then run away from origin[2]

Stay for 2 seconds; move at a constant pace for 2 seconds, stop for 2 seconds then walk at constant speed [3]

This in a velocity time graph. in this graph you walk backward then you speeding up , then you walk a a constant pace in the same direction. you walk forward at a constant pace then you stop. [4]

Start at 0.8m move at constant speed for 3.75s, tops for 2.5s the runs 3.25s [5]

You walk backwards for 3s then forward at a constant pace for another 3 second then you stop. [6]

[1]

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration







[2]

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration








[3] If this was a d-t graph. It would be then a line on the x-axis then a straight line at an angle going up then a line on the x-axis then a straight line at an angle going down (stops at the origin)
If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration 

[4]

If this was a a-t graph there would be a positive horizontal line an a straight line on the x-axis because there was no acceleration afterward

[5] If this was a v-t graph A positive horizontal line, then a line on the x-axis then a positive horizontal line

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration

[6] If this was a d-t graph. It would be a straight line at an angle going up then a straight line at an angle going  down.
If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration

Motor; spin and burn

On Thursday 30th the whole class walked in the room in hopes that their motor will spin 3 time (1080 degrees). We all brought in supplies such as paper clip, wood, soda cans, and nail for what we couldn't bring Mr.Chung kindly brought such as the hammers and corks.

I started off by hammering the four nails in to the plank of wood with the distance of 4 cm apart while my partner Lena sanded the soda cans to perfection.
After I finished with the hammering, I try to make the axle by sticking a kabob stick through the cork. At first it seemed easy until the point where the stick reach the middle of the cork and it wouldn' move after snapping 2 kabob sticks i found out that you first use a nail fist to make a hole, finally on the  third try i successful finish make the axle and Lena finished sanding the soda can strip and making the base for the axle to rotate on.
Then my panther started warping the copper wire around the cork while I was making the base more secure.

There we are finished and only need to test it out.

Test number one (not really) : Rejected do the the wires not being parallel to the commutator pins.
Test number one  : failed commutator pins were too close to the cork.

Test number two  :Unknown

Overall I gained valuable knowledge of where my mistakes were and how to avoid them in the future.