Test Day

This image shows us setting the trebuchet.

 On our test day our trebuchet performed much better than we had ever thought. On average it shot 40 meters and it was very accurate. We did not expect our trebuchet to do so well due to the fact that we had built it the night before. We had some difficulty with the pouch. The pouch kept pulling tight, not allowing the ball to fly out. We also had some difficulty keeping our trebuchet from falling over after the ball was thrown. To avoid this problem we put weights on the front to stop it from falling backwards.

This is an image of Shelby and my trebutchet. We used a shot sling because we found it the most efficient.

This is just another view of our trebuchet.

  In our paper trebuchet challenge our trebuchet did very well. Our trebuchet was constructed quickly and correctly. Shelby did a very good job making our pouch.We learned that the more weights that you added and the closer you got to a 45 degree angle, the farther the projectile would go. In the end it took 35 washers and our angle was very close to 45 degrees. On average our paper trebuchet shot 6.5 meters and was very accurate. Due to the fact that we tested them inside, we did not have to deal with wind resistance. The only environmental factors that we had to deal with were gravity. 

Egg Drop Challenge-Competition day

On competition day our container failed earning us 0 points. Our container was a ball and had a diameter of 14cm and weighed 112.1g. We dropped our container from 5m.our container fell the fastest, it fell at 0.81 seconds.
I find that the restriction that was the most limiting was the fact that we couldn't use a parachute. I believe using a parachute would have made the challenge much easier. the most effective part of our containers design was that it could impact at any angle, there wasn't a certain way that it had to be dropped. Our lest effective part was how we cut the hole. We had to shove the egg into the ball therefore we weren't positive if it was fully in the center.
If we wanted to adapt our container to safely contain two eggs we would have to use a larger ball so you would have more cushion.Also if we had a larger ball we could cut two different holes for the eggs.
The image above is me taking our cracked egg out of our container. The video below is of our egg drop.

Physics grade 12. Feb.28

On test day our containers performance was bad at first. Our egg cracked the first time we tried it. We started off using a small cardboard box filled with cotton balls. We tried packing the box even more with cotton balls but it failed again. We decided that we needed to come up with a different idea so we found a foam dodge ball. The dodge ball was light and had a lot of cushion. We cut a hole in the ball and put the egg in the middle. We tested it twice and it worked both times. Both times we dropped it from the top of the stairs.