best cannon.

A cannon is basically a form of weapon that requires some sort of gunpowder to fire. Cannons were extremely popular during the World Wars. Cannons have been developed over many years from other projectile weapons to the ones we have now. Many countries have designed different sorts of cannons.

Obviously in our Physics class, we won't be making a real cannon but something similar to that. Mr. Chung showed us an example made from the previous semester. It was basically a few popcans secured by duct tape and at the top, was the object that would be shot. It looked like two foam cups taped together. It was cool to see when it was ready that the cannon actually worked and projected the object.

For the design it looked like a real cannon one that had a wide base that seemed to prop up the whole structure and the cannon was positioned at an angle almost 45 degrees. The cannons we build will be fixed but I remember seeing short clips of real cannons being fired and they were adjustable.

Can't wait to build our own cannon! (:

acceleration lab results.

our structure.

As you can see we used the CN Tower design for our structure with a firm and heavier base which was able to support the structure. We rolled newspaper into thin rolls and attahced them creating a very long pole. It was around 2m and the highest standing structure in the class :D !

cn tower.

We were faced by another challenge in Physics class. We had to build a structure only out of 4 sheets of newspaper and a table wide strip of tape. We had to build a structure that had to be as high as possible and one that was very sturdy.

The CN Tower in downtown Toronto was one of the tallest man made structure from 1975-2007! It was the record holder for many years and definitely many people visited this building and still do today. The CN Tower is 553.3 m. We sort of based our model based on the CN Tower because we made the base stronger and heavier.

What makes the CN Tower so tall is the additional rod at the top attached to the viewing deck. So in our structure we incorporated this idea. We tried to make a strong and heavy paper of the material we had and save one piece of newspaper and make the thinnest rod we could make. We did this by ripping the newspaper into 4 large strips and rolled them as tightly as possible and then attached them. Adding an additional piece of tape we were able to make our structure even taller.

projectile motion cases.

CASE 1)

CASE 3)

thoughts on how to build an egg glider.

Our next challenge in physics is to build an egg glider. Our initial ideas were we had to build a basket of some sort to protect the egg because not only does our egg glider have to glide, when it lands, the egg can not have any cracks. This was the hard part because we're only given four different types of materials, a table length of tape, 25 straws, scissors and a sheet of newspaper. Different ideas were brought up as the wider the area, the more force is spread and the force won't be concentrated on the egg, causing it to break. Although this was a good idea, it was hard to achieve because not only did we have to build the protection for the egg, we needed to build wings for the glider.
For the wings we decided if we made them bigger it would be better, but Mr.Chung warned us if we made our wings too big, it would easily get damaged. A lot of our glider sketches in my opinion looked like a kite.
We drew rough sketches of different combinations and we decided we would build a large wing and in the center, we would attach the egg "basket" containing the egg. For the basket, we would either make a chamber cutting the straws in half the using them to make the sheet and wrap it or make a cone shape.
It was very difficult to come up with ideas because of the limit of materials. We couldn't use too many straws on either the basket or the glider. So at the end of the class we had a rough sketch of what we wanted to build but we weren't sure if it would be possible to build.
Our egg glider sort of resembled an airplane so when searching up aerodynamics i used this website for a basic understanding of how airplanes work:
http://science.howstuffworks.com/transport/flight/modern/airplane1.htm
what i realized was this is actually really difficult because lift=weight and drag=thrust. This means the the top and bottom area of the plane and front and back must be equal to keep up the plane. If we incorporated that idea into our plane, it would be really difficult because the egg would definitely be heavier than the glider structure making it unbalanced.
To get an overall understanding of simple aerodynamics and how it works in a car:
http://www.howstuffworks.com/fuel-efficiency/fuel-economy/aerodynamics.htm
I learned about air resistance: forces acted upon a moving object by the far, also known as drag
and the idea of how air and wind are kind of like a wall on a really windy day and you're trying to move through it at a high speed. Although we weren't building it based on a car and it moving at high speeds, it was interesting to learn about that.

word problems.

Big Five Problems

finally finished! (: