It has to be 1 meter high, have 3 hills, with loops or turns. Any websites or advice on what materials to use would be very helpful.
208399
Personally I would use 2 metal rods and a ball bearing or marble.  bend rods so they are spaced the same with loops first and then hills.  then find a way to project marble or ? with enough force to stay on track without falling off. try different speeds and re bending rods until satisfactory results are obtained.\n\nThat would be much easier than trying to do all the math required, then obtaining the speeds and angles required to build an actual roller coaster.\nThis should be acceptable for classroom project.
420488
Here's a site with alot of different ideas and difficulty levels with instructions.  Maybe you can find something here.\n\nOr you can tell us more about what you are wanting to do and what you like and we might be more helpful on here.\n\nhttp://www.all-science-fair-projects.com/
157985
Try http://www.hica-world.com for a list of possibilities.
170106
try tripod.com\n\nsample:   http://yoursite.tripod.com
229946
There are various things you can use. Try CDs, toy wheels, cotton reels...\n\nLook for objects with low 'rolling resistance' and a large diameter. This will help it go further. Good luck!
575581
use an inanimate object like a tree pnce u master basic drills find somthing that movess like a dog or other
216842
Use a wooded body. Large Wheels in the back like records and small wheels in the front. Also put the trap on the top of the car and rap it around a nail. (this was my 7 grade project I A it, we also  has to go a certain distance)\nThis web site has a mouse trap car kit you can buy http://www.mousetrap-cars.com/project-plans.htm\nAlso here are some instructions and supplies you can use like Cd's. http://www.geocities.com/hearne_jason/mousetrapcars.html\nHere are some photos of the cars http://www.lausd.k12.ca.us/Lincoln_HS/Gallery/ms-car.htm\nHave fun and it doesn't take long it a Saturday afternoon project.
150962
Try this site:\n\nhttp://www.recmanagement.com/features.php?fid=200305FE02&ch=3\n\nAnd also, this site gives a step by step demonstration using pictures.  As to where to acquire the materials or how to rent a polaris to move the material, I think might be another Yahoo! Answer.\n\nhttp://www.aukebaylandingcraft.com/BuildingTrails.html\n\nHopefully, this gives you some idea of the direction to go.  Good luck!
356040
Check with your city's Parks and Recreation Department. They should be able to help you find something. HAVE FUN!!
260008
how high do you want it?\n\nthe cheapest is frost fencing.  don't buy the shit from the hardware store but order from a real fence company.  just dig the holes, plant the posts wtih a level, and then stretch the wire over it.  shouldn't be more than a two man job maybe rent a bobcat to come and drill your holes for a big field.
651044
if its somewhat large, or near something very important, i would recommend going to a local geotechnical/ civil engineer.  \n\na few hundred bucks may be worth it not falling over, and then you are out the wall and the money.  better safe than sorry.\n\nan engineer will review site and soil conditions to give you a quality end product, and a guarantee
182080
Just pulling something from the top of my head, and thinking about the new releases....Do "King Kong", although I haven't seen the new movie yet, I am sure its pretty close to the original.  Build skyscrapers out of cardboard boxes, paint them up to look like buildings.  Go out and get a gorilla stuffed animal, a dinosaur stuffed animal, some small toy cars, maybe make a highway out of cardboard too.  Not sure how big your campsite is, but this would be an easy way to decorate.  Good Luck, and have fun!
134380
OOO, We did this project in IPC, except our was 20 meters -.-;;. You're ideal angle is 45 degrees. That usually gets you the farthest. It would be pretty smart to use elastic potential energy by using piece of bamboo or just a flexible stick (haha, flexible stick) or just a rubber band. Don't put anything on the egg. Our model was made with a giant rubber band that I found on the floor, and a little seat attached to the crossbow model. If your teacher is strict about a catapult model, your best bet would be to use the bamboo stick and research trebuchets.
355201
Try www.3gforfree.com
63327
Use cardboard, clay, or sugar cubs.  Cardoard would be the easiest.
372355
easy \n\nU make a triangle between the centers of the 3 circls \nmeaning it would have three lines = 2*R = 2m\nso the hight of the triangle would be root of ( R*R - 0.5R * 0.5R)\nso it would be the root of (3) which is( 1.73)\nthe hight would be 1 + 1.73+ 1 = 3.73 m
59231
If you have to actually build this thing then a castle-style drawbridge would probably be the easiest thing I can think of. \n\nBuild a tower out of boxes, wood or whatever. If you’re real lazy simply stand a shoebox on its end and paint an archway on what was the bottom.\n\nCut a piece of cardboard slightly narrower than the base of the box and about 8 inches long. That piece of cardboard is your span.  Bend the first couple of inches of the cardboard up at right angles. Push thumbtacks through that bent up section and into the tower a few inches above the tabletop. That way when the span is lowered it will slope downwards on to the table.\n\nPass a piece of wire through a cotton spool and bend both ends around to make a U shape. Bend the ends of the “U’ shape into tight circles. You can now put a screw through those circles and into a piece of light wood/heavy card that you can glue to the tower somewhere near the top.\n\nPoke a hole in the free end of the span. Tie some thread through it. Pass the thread around the cotton spool a few times. \n\nYippee, finished in one afternoon.\n\nWhen you turn the spool the span will lift. The spool is both a wheel and a pulley system. The span itself functions as a lever. Because the span slopes downwards onto the table top it is an inclined plane/ramp.\n\nAttaching a couple of parts using screws and a couple more using nails/tacks gives you your screw and wedge.\n\nSimple. Next time don't procrastinate.