Purpouse
Our goal for this project was to build a trebuchet and fire a projectile a as far as possible, The restrictions are as follows:
In our trials, we found out that on average, every time the fulcrum is raised every 4 centimeters, the distance of the projectile increases by ⅓ of a meter.
In our experiment, we drilled five holes in each frame at different heights. The shortest was 19 cm and the highest was 34 cm. The other heights we used were 30.5 cm, 26 cm, and 23 cm. We tested these heights and recorded the results.
In 19 cm, we got 1.33 meters. When we raised the fulcrum to 23 cm, we got a distance of 1.66 meters. And when the fulcrum was at 26 cm, the projectile flew 2 meters. There is a trend where every time the fulcrum was raised every 4 centimeters, the distance of the projectile increased by ⅓ of a meter.
When the fulcrum rose 30.5 cm, the projectile went 2.66 meters. The farthest distance we got was 3 meters, and this was when we tested the 34 centimeters. Here we have a clear jump between the trials where the axle had a height of 26 cm, and 30.5 cm, this was when we replaced the stop bar with a metal pipe. But then the results soon stabilize with their trend of every four centimeter increase, the distance increases by ⅓ of a meter. I think because the axle was raised, the rubber bands became tighter and there would be more spring PE.
The horizontal distance was 30 meters and our vertical distance was 6 m, the total time in the air was 1.17 seconds. Our horizontal velocity was 26 m/s, and our vertical velocity was 10 m/s. Our release angle was at 28°. Our spring constant was 133 n/m and the spring potential energy was 10.6 J, and our kinetic energy was 52 J
- The design cannot exceed more than 1 meter in any direction,
- There must be two legs
- The trebuchet must be at a set location
- Must be easily portable by one person
- The lever must have both a load and effort end
- May be set by a person but not provide the firing
In our trials, we found out that on average, every time the fulcrum is raised every 4 centimeters, the distance of the projectile increases by ⅓ of a meter.
In our experiment, we drilled five holes in each frame at different heights. The shortest was 19 cm and the highest was 34 cm. The other heights we used were 30.5 cm, 26 cm, and 23 cm. We tested these heights and recorded the results.
In 19 cm, we got 1.33 meters. When we raised the fulcrum to 23 cm, we got a distance of 1.66 meters. And when the fulcrum was at 26 cm, the projectile flew 2 meters. There is a trend where every time the fulcrum was raised every 4 centimeters, the distance of the projectile increased by ⅓ of a meter.
When the fulcrum rose 30.5 cm, the projectile went 2.66 meters. The farthest distance we got was 3 meters, and this was when we tested the 34 centimeters. Here we have a clear jump between the trials where the axle had a height of 26 cm, and 30.5 cm, this was when we replaced the stop bar with a metal pipe. But then the results soon stabilize with their trend of every four centimeter increase, the distance increases by ⅓ of a meter. I think because the axle was raised, the rubber bands became tighter and there would be more spring PE.
The horizontal distance was 30 meters and our vertical distance was 6 m, the total time in the air was 1.17 seconds. Our horizontal velocity was 26 m/s, and our vertical velocity was 10 m/s. Our release angle was at 28°. Our spring constant was 133 n/m and the spring potential energy was 10.6 J, and our kinetic energy was 52 J
What do these terms mean?
Horizontal Velocity - the horizontal velocity of an object. In archery the horizontal velocity is the velocity of the without the downward motion.
Vertical Velocity - the vertical velocity of an object. the vertical velocity in archery is the velocity it takes for the arrow to fall.
Total Velocity - the hypotenuse of the vertical and horizontal velocity because the Pythagorean Theorem which allows you to find the velocity accounting for both the horizontal and vertical velocity. you can find the total velocity bey using a ² + b ² = c ² where A is the vertical velocity, B is the Horizontal Velocity, and C is the Total Velocity
Reflection
Peaks |
Pits |
We improved from launching a projectile only 2 meters, to launching the same projectile 30 meters.
We got streight to building and finnish our inital design and tweaked it from then on out. We worked well together. |
We had to tweak our design... alot
I'm a workaholic, I tried to do all the work, but my team stopped me. My teammate was absent the majority of the time. |