This is a trebuchet we made for our Concept Physics class. Our trebuchet threw a golf ball a distance of over 29 yards! We were the only all girls group in our class and we built the best trebuchet. We did a little bit of research and set out to construct our own and here is what we created!
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7 - 4 ft long 2x4"s
2 - 2 ft long 2x4"s
4 - 3 ft long 2x4"s with the ends cut at 45 degree angles
4 - swivel chair wheels
1 - 2 1/2' re-bar
an eye hook
4 ft of string
a sack
1 laundry detergent basket
2 - 2 ft long 2x4"s
4 - 3 ft long 2x4"s with the ends cut at 45 degree angles
4 - swivel chair wheels
1 - 2 1/2' re-bar
an eye hook
4 ft of string
a sack
1 laundry detergent basket
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I think you'd better check each other's data.
I'm impressed.
Do you have any idea what you're talking about, or do you just go around bashing on everyone's instructables to make yourself feel better?
Come on, dude, we're in high school. Nothing is perfect.
Just the opinion of a manager, commanding officer, supervisor, entrepreneur, adrenalin junkie, parent...etc.
The instructables community is an incredible resource of skill and knowledge that freely share with each other without expecting anything in return- wish I had had such support when I was in high school. If my teachers had had such a resource...
After all, I've only written 100 Instructables, and I'm only a Science teacher. Yeh, what would I know about publishing an Instructable on a Science project?
That was constructive criticism. Your teacher warned you that you would get criticism (I think the phrase he used was "If you do a poor job putting this together, the Instructables community will tear it apart!"). If you want bashing, I'll be happy to oblige, but maybe you'd prefer some questions that I would ask if one of my 12-year-old students handed this to me as a piece of work?
- Shall we start with the strange mix of Imperial and SI units?
- Or the claim of research done without sources being referenced?
- Or the 133:1 ratio, where did that come from?
- Or how you know that wheels increase the range? Did you try it without?
"We're in high school" is not an excuse for not doing your level best.Oh, and congratulations on finding the edit button.
Grow up and get some maturity.
Unless you have led a very sheltered life, you should be aware of how important constructive criticism is to the learning process.
These students made mistakes which, if my own pupils had made them, would have been laughed out of the classroom by their fellow pupils. The authors' own teacher gave them a specific warning about the expectations of this site.
Suck it in, get over yourself, and post something that isn't a waste of bandwidth.
You are right. Criticism is needed to succeed. Obviously too much is bad. As my STEM teacher says; "Put on your yes face." :D
I'm sure glad your not my teacher.
but hey whatever floats your boat
(Water, usually).
All I did was suggest that students check their data.
As for rudeness, did you bother reading your own post out loud before hitting "post"? Try it sometime.
All members here are on a level playing field - if you can't cope with a touch of sarcasm, you're not going to get far in life.
(I wonder, dare I ask your specialism?)
i don't know how... but you just did.
It was sarcasm - read the thread.
"The wheels not only help with transportation but also allow more force behind the throw of the trebuchet."
what is the basis for the assumption that the wheels add to the force?
the only way I see that being possible is if you are rolling the trebuchet downhill at the time of launch, and even then the added momentum would be negligible unless it is an insanely steep hill.