# data[].attributes.body
I only got as far as my paper cup... just a post for example. The cup

# data[].attributes.body
The launcher tends to launch down, my goal is to try and make the launcher angle higher up.

# data[].attributes.body
Should test is twisting or pushing down is more effective

# data[].attributes.body
It works! A little...

# data[].attributes.body
Is there an easy way to get rid of the resistance from the holes?

# data[].attributes.body
I think making more room for the lever arm to be pushed down would create more room for the lead arm to swing

# data[].attributes.body
It worked well, but I have a few ideas to make it better. Hopefully, my theories are better than the experiment.

# data[].attributes.body
I'm testing if adding a straw restriction on my device helps/hinders my goal (in collapsing the box tower)

# data[].attributes.body
The friction between the pencil and the holes in the box made it hard to launch the projectile

# data[].attributes.body
If I increase the depth of the box by making the holes higher up then the projectile will go further because it will have more potential energy as it reaches a higher point.

# data[].attributes.attachment_caption
I used a paper ball, but it didn’t travel very far (around 1m)

# data[].attributes.body
My launcher that launched a paperclip 98cm

# data[].attributes.body
I wonder if adding potential elastic energy or potential gravitational energy would help combat some of the lose materials and make the projectile launch further

# data[].attributes.body
Launched about 195 cm counting the skid, without the skidding only about 60 cm

# data[].attributes.body
- propelled around 8 ft

# data[].attributes.body
I think I should increase the ratio between the load arm and the force arm (load arm longer)

# data[].attributes.body
I didn't want to cut holes in my box, so I used elastics to hold it in place.

# data[].attributes.body
- use hot glue to keep the bottle cap more stable
- longer pencil
- larger box

# data[].attributes.body
I can measure the distance until it hits the ground

# data[].attributes.body
I'm going try increasing the length of the lever to try and get more distance.

# data[].attributes.body
Maybe using potential elastic energy (similar to a catapult style) to increase height or distance.

# data[].attributes.body
The displacement of the projectile

# data[].attributes.body
If the side where the fulcrum is closest to had more leeway (ex. there was a slit that goes further down/no side at all), would this allow the launcher to go further with more movement?

# data[].attributes.body
I’d like to add elastics to my structure (to increase the tension). I also want to experiment with lighter and heavier projectiles.

# data[].attributes.body
Giving more room for the effort arm to be pressed down allowed the load to go much further, I measured the distance to know this.

# data[].attributes.body
I will measure the distance travelled by the projectile

# data[].attributes.body
I want to change the space the lever has to pivot (take out the base of the box) to see if the distance until it hits the ground changes. My prediction is that if it can pivot more, it will launch further.

# data[].attributes.body
increase the amount of elastics to get the most of out the potential energy

# data[].attributes.body
Comparing the distance travelled by my projectile from the first launch to the last.

# data[].attributes.body
I can measure the speed of the projectile

# data[].attributes.body
I would keep distance, force and height constant, and measure differences by seeing where my projectile hits on my box stack. Bottom box is 1, one above that is 2, etc.

This is a not-accurate way of measuring angle.

# data[].attributes.body
Increase the potential energy. Maybe tighten the grip that the rubber hand has with the pencils so that more tension is released

# data[].attributes.body
I can add another pencil above the launcher as it can help the projectile get height instead of shooting straight down.

# data[].attributes.body
I am going to change the height of the holes in the box, and measure the distance travelled by the projectile. How does the distance travelled change if the depth of the box is increased?

# data[].attributes.body
I will measure the distance the projectile travels vertically, and horizontally.

# data[].attributes.body
Having a sturdier base: I noticed that my whole box tended to shift around whenever I launched something.

# data[].attributes.body
A slomo fuction on my phone can determine the "nozzle velocity" of the launcher by picking two frames, finding their change in distance and then dividing it by the time taken

# data[].attributes.body
By using the rate of change and distance, we can identify the speed and calculate the differences between each test result.

# data[].attributes.body
I could try to make the holes in the box larger to see if reducing the surface area of contact between the pencil and the box will change the direction of the projectile

# data[].attributes.body
I like my catapult because it uses a lot of elastics, everything is fastened together firmly and it is very satisfying.

# data[].attributes.body
I can measure height by taking a video once without the modification and a second time with the modification.

# data[].attributes.body
Instead of pushing down on the lever, I'll try to use potential elastic energy and observe the displacement of my projectile. Will this increase the distance that I can launch my pompom?

# data[].attributes.body
I'll tape another pencil to the load arm to see if that increases the distance that the load travels and if the projection angle increases. Will the length of the load arm be too long for the limited weight I place on the effort arm to launch?

# data[].attributes.body
I am going to change the placement of the fulcrum to increase the ratio between the load output and effort input. To prevent a change in launch angel, I'm also going to restrict the range of motion from the lever arm. I am going to observe the change in horizontal displacement and comapare it to the previous displacement.

How does the dispalcement change? does it increase or decrease, and to what magnitude?

# data[].attributes.body
I can measure the horizontal or vertical distance.

# data[].attributes.body
Change - straw position
Observing - box hit

Question - what is the optimal position for the restricting straw to be in?

# data[].attributes.headline
I can maybe test why the theoretical results might be different from the actual results.

# data[].attributes.subject
I can maybe test why the theoretical results might be different from the actual results.

# data[].attributes.body
I want to figure out how the height of the catapult from the ground will affect the distance.

# data[].attributes.body
I can carefully observe the motion of the projectile by taking a slow motion video

# data[].attributes.body
I am adding a counterweight and observing the distance the projectile travels after the change. To what extent will the counterweight increase the displacement of the projectile?

# data[].attributes.body
I will use a tape measure.

# data[].attributes.body
I would change the distance of holes and space where the fulcrum is closest to in order to give the arm more space to move and increase projectile motion.

How does the allowance of the box effect the distance traveled?

# data[].attributes.body
I want to change the length of the pencil (I’ll try using a longer lever) and I also want to increase the tension.
I’ll observe the vertical distance travelled by the projectile.
How will the length of my catapult affect the distance travelled by the projectile?

# data[].attributes.body
I am going to increase the space for the lever to pivot and using something to stop the lever arm from going all the way to give the projectile a more optimal launch.

# data[].attributes.body
I am going to change the length of the load from the fulcrum, and measure the distance of how much further the projectile goes.

# data[].attributes.body
Not the best design projectile, however its functionally sound.

# data[].attributes.body
Keeping all variables the same, I will adjust the height of the holes in my box and place the catapult one rung higher. We will see if it travels further.

# data[].attributes.body
Results of the "Money Stealer 1000"

Arm rotation gets more restricted as position number increases

P1 - Low Box 2
P2 - High Box 2
P3 - High box 3
P4 - Mid Box 4
P 5 - Low Box 4
P 6 - High Box 4
P 7 - Does not reach box

Distance from box = 1 scissor length
Force was provided by hand.

Conclusion: Restriction to position 3/4/5 would be the best placement

PS - I lost $4.05 under my couch. In the name of science!

# data[].attributes.body
The projectile travelled the same distance (around forty-four centimetres), however, it went higher.

# data[].attributes.body
Went higher with the weight. However, displacement is hard to measure as it varies for all attempts

# data[].attributes.body
After increasing the pencil length on the load arm, the load flew much further, but it is difficult to measure improvements correctly as results vary for every run. Structure is also very unstable.

# data[].attributes.body
I started with a 10.5cm load arm which launched the ball a bit before the door. When the load arm was extented to 13.1cm, the ball reached the door, but not much further than the original experiment.

# data[].attributes.body
The cheerio went across the room which is approximately 25 ft.

# data[].attributes.body
I increased the length of the lever by about 4 centimeters. By increasing the length of the projectile travelled over 30cm more than the original model.

Original model: 76cm
Updated model: 114cm

# data[].attributes.body
I did 5 trials for each level of the box.
Box level one: an average of about 40in
Box level two: an average of about 55in
Box level three: an average of about 80in.

(I say about because I had to adjust the results roughly based on the amount of effort I put into every launch)

# data[].attributes.attachment_caption
After adding some elastics and using a ruler instead of a pencil, the projectile travelled a lot further (3-4 m)

# data[].attributes.attachment_caption
Huge increase in height but unfortunately shortened the projectile displacement significantly.

# data[].attributes.body
maximum launch was 12’