its been fun

Claire giving moral support to Victoria from 3 states away in a moving vehicle. ITS THE HOME STRETCH.

PHYSICS

Picture 1: Overview.

 General picture of the catapult. Labeled is our main parts to the Trebuchet.

Picture 2: Force. 

Forces shown while catapult is in motion. The normal force pushes the balloon up while the gravitational force pulls the balloon down. The weight swinging creates the applied force of the balloon. There is also tension and gravity acting on the Balloon while the catapult is at rest. The sling allows for optimum distance because of the conditions in which the balloon is held.

Picture 3: Projectile Motion.

Because the balloon flies at an angle, there is horizontal projectile motion present. Forces have a contribution to the motion because it is the force and velocity which impacts the motion. there is distance change in x and y which is calculated by the sin theta. This shows optimum angle and speed at which the balloon should be released to get it to go the farthest.

Picture 4: Potential and Kinetic energy in motion.

(Sorry its upside down i couldn't figure out how to flip it)

While the balloon releases, the catapult has kinetic energy at the top of the arm and the bottom where the weights are being dropped. Kinetic energy is present whenever the catapult is in motion. While the catapult is all the way upright, there is kinetic and potential energy. Both help carry the balloon out of the sling and on to the ground- 25 feet away.

Picture 5: Energy at rest

When the catapult is set up in the position right before we pull the trigger, the only energy acting upon the catapult is potential energy. Nothing is moving, so kinetic energy is not applicable.

Picture 6: General energy overview.

Energy happens.

5/19/14

Enlisted the help of Victoria's dad to add another weight on the catapult. Then launched- and it worked! It went well over 25 feet. YAY

After we got the catapult to finally work, we started working on the physics behind the catapult (which is why there is paper everywhere). Then we connected a rope to our Trigger which was first tied to Victoria. 

5/17/14

had a day dedicated to just painting. Finished painting the whole catapult and then decided it would be a good idea to add  glitter. There is alot of glitter. We couldn't attach the second weight at this point in time.

5/14/14

Modified the sling and hook a little bit more after this and decided to add a second weight in order to make the balloon shoot further.

all members present

5/13/14 (Evening)

added our weight, which is a 14 pound dumbell. Getting ready to launch for the first time and devise a method to make a sling

first launch went backwards. more revision necessary. We changed the angle at which the hook released the sling to see if that made a difference

It went in the right direction, but not far enough. We then decided to change the hook angle again and modify the sling so the balloon stayed in better.

all members present

5/13/14 (afternoonish)

Glued our pole in place and nailed our supports to the base. Started painting Narwhals on the catapult. -All members present

5/12/14

creation of the base- both members present

"All wood is recycled because it comes from trees"

-Nicholas Guild

 Today we put together the pieces of wood and measured the wood for the base to be exactly two feet. We used a saw to cut the wood and create a layout of the base for our catapult.

Today we made a game plan, and figured out the supplies we needed for the catapult. We also decided on a time and day when we were going to gather the materials.

Physics behind the project

Force:
The forces acted on the catapult
are gravitational force, and normal force.

Meeting Number 1

Today we constructed our blog and researched the history and physics behind the Trebuchet.
It was grand. We got a lot done.