Cannon

BOOM!

A cannon is defined as A cannon is any piece of artillery that uses gunpowder or other usually explosive-based propellants to launch a projectile (Wikipedia). The have long narrow "necks" that can launch a projectile a great distance. The angle of the cannon to the ground plays an important role in the distance traveled by the projectile, with 45 degrees being the greatest distance.

Newton's third law states that "With every reaction, there is an equal, opposite reaction". Therefore if the cannon has a lot of firepower, it should be constructed to withstand the opposite reaction.

Newton's Lab - Results

1) acceleration vs. force 1

d1=0.8 cm d2=3.0 cm dt=24 cm
t=1/30 s a=1.6m/s2
v1= 0.24 m/s v2=0.9m/s

2) acceleration vs. force 2

d1=2.9 cm d2=9.0 m dt=58 cm
t=1/30 s a= 5.6 m/s2
v1= 0.87 m/s v2=2.70 m/s


3) acceleration vs. force 3

d1=3.5 cm d2=7.3 cm dt=35 cm
t=1/300 s a= 5.28 m/s2
v1= 1.05 m/s v2=2.19m/s

4) acceleration vs.mass 1

d1=0.8 cm d2=3 cm dt=24 cm
t=1/30 s a=1.6m/s2
v1= 0.24 m/s v2=0.9m/s

5) acceleration vs. mass 2

d1=6.5 cm d2=10 cm dt=54 cm
t=1/30 s a= 5.2 m/s2
v1=1.95 m/s v2=3.06 m/s


6) acceleration vs. mass 3

d1=5.5 cm d2=13 cm dt=53 cm
t=1/30 s a= 11.8m/s2
v1=1.65 m/s v2= 3.9 m/s

Newspaper Tower - The product

Our plan actually worked. The base was sturdy enough to support the length of the tower. The tower was around 1.8m tall, and could actually stand. The only problem was that the tower was a little slanted, which threw the measurement off a little.

The tower of Newspapers

We have to build a tower with nothing but tape and a few sheets of newspapers. Since most tall towers are narrow, we are going to roll the newspaper into long sticks, and then sticking them together. We want to have a kind of triangular base, and then have the rest of the tower extend up, just so that it is stable.

The Egg Glider-An update

Our. Egg. Died.

He died.

The glider glided for less than a few seconds, and then it went down.

Sad :(

Projectiles :D

So there are 5 cases of projectile motion. They are listed here:

And here are the practice problems~

Gosh, I miss my scanner...

Building the Egg Glider

Building the egg glider was an...interesting experience. I remember during the first half of the class, my group members and I were panicking. We did some research, but we still had no idea how to actually make the thing fly. We tried making it look like one of those gliders with the big wings, but that crashed. Mr Chung advised us to bend the tip of the wings, and that helped a little. Later, we added a tail because we saw some other group do it. We tried to fly the glider later, but again, it crashed. We didn't give up. We kept making alterations to the glider. It can glide now, but it really depends on how we throw it. On the day of flying, I'm just going to hope for the best. Hopefully, whoever is throwing the glider will throw it in a way that it will glide c:

Big 5 questions 2

I made a lot of mistakes in the last one, and for some reason, I did the wrong questions. This is my actual work, with the right questions

Something about walking-Experience and Translations (OMG 2 blogs in one)

These are the results of the Kinematics lab. The graphs are translated into d-t/v-t and a-t graphs.

And here are the translated versions of the graphs, all on one page.

So the "walk the graph" experience was a lot of fun. We were given a motion detector, and a few graphs to "walk". We had to match our movements to the graphs. The position-time graphs were easy to match: A horizontal line means you are not moving, a sloped line means you are walking at a constant velocity: a positive slope means you are walking away from the origin, and a negative slope means you are walking toward the origin.

For the velocity time graphs, if the slope of the line is zero, you are moving at a constant velocity. If the line is positive, you are walking away from the origin, if it is negative, you are walking toward the origin, and if the line is at 0, you are stationary. A sloped line means you are accelerating (positive slope: speeding up, negative slope: slowing down). Sounds easy, right? Well, it was hard. We tried the geisha walk, but it didn't work out that well. We didn't have the skills or the patience to shuffle around that slowly. We must have spent at least half the class trying to walk those graphs.

Near the end of the class, we had to make a graph for other people to walk. Our "graph" was created by running randomly in front of the motion detector.

All the Right Hand Rules

Wow, I really feel like blogging today. So this post is about the three Right Hand Rules~


This is Kittie. Isn't he cute?
You will have to curl your fingers like he does for the first 2 RHRs.

RHR #1: The thumb points to the direction of the CURRENT flow, and curling your fingers like a kittie shows the direction of the magnetic field. This rule is used for conventional flow.


RHR #2: The thumb points to North, and the kittie thing shows the direction of the current flow. This rule is used for coils.



RHR #3: The thumb points to the direction of the current flow, the straight fingers point to the field likes, and the palm points to the direction of the "Force".

Concept Map + 10 Things About Electricity you Need to Know

Isn't this beautiful?

So 10 things about Electricity:
1. Difference between conventional current and electron flow
2. Ohm's Law
3. How to calculate Volts
4. How to calculate Amperes
5. The meaning of "Coulombs"
6. The different formulas for Power
7. The difference between Series and Parallel circuits
8. Kirchoff's Laws
9. The units used to measure Current, Voltage, and Resistance
10. How to solve complex circuits

Ohm vs. Kirchoff

I forgot the password to my old Blogger/GMail account, so I made a new one :D

So we learned about Ohm's Law, which describes the relationship between current (I), voltage (V), and resistance (R).
It states that  R=V/I, I=V/R, or V=IxR.
BlogThis!

Favorite Rollercoaster

That's just amazing.
I like the Alice in Wonderland one too, but I can't find a picture of it.

From Battery to Circuit

Today we learned how to use voltmeters and ammeters. Ammeters measures the current (Charge in coulombs/seconds). The amount of electrons passing through 1 point in a DC (direct current) in a period of time will equal the amount of electrons passing through any other point in the circuit within the same amount of time.The voltmeter measures volts, or the electric potential difference (energy required/charge in coulumbs).


How electrons flow from battery to circuit.

Energy Ball Experiment

On Friday, we experimented with an energy ball.

I guess it's a really interesting way to start the semester. We were put in groups and given a little white ping pong ball. We made the ball light up and buzz by using our fingers as wires, and completing the circuit. We had to answer a bunch of questions. They were all pretty easy, except the one asking why the energy doesn't work on certain people. I think the reason has to do with the fact that some people have dry, insulator skin, but I'm not sure.

At the end of class, we had to work together to make a parallel circuit with two energy balls. We succeeded.