Physics Olympics Schedule

Saturday March 22, 2003

Time	Event	Location
8:30 AM	Registration & Refreshments	Room 335, Science Building
9:00 AM	Welcome/Instructions	Room 335, Science Building
9:15 AM	Morning Events
	Rubberband Boat Race	Room 334, Science Building
	Mousetrap Car Race	Shelton Gym
	Egg Drop	Loading Dock, Science Building
12:00 AM	Lunch	Union Station, University Center
1:00 PM	Afternoon Events
	Eggstraction	Tennis Courts
	Water Rocket	Intramural Fields
	Trebuchet	Intramural Fields
3:45 PM	Ribbons and Trophies	Room 335, Science Building

MOUSETRAP CAR RACE

Objective: Each team is to produce one vehicle powered by a mousetrap. The vehicle should travel a distance of 10 meters in the shortest possible time.

Apparatus: Each team is responsible for designing and building one mousetrap-powered vehicle prior to the day of the competition. SFASU will provide the timing system.

Regulations: A mousetrap spring is to provide the sole source of power for the vehicle. No other stored energy supplies - including gravitational potential energy - may be released by the spring.

The trap used to power the vehicle must be sold commercially as a mousetrap. As such, the trap spring should consist of a steel wire nominally 1.3 mm in diameter wound into a coil nominally 7 mm in diameter with approximately 20 turns. Rattraps, or any other traps with springs differing significantly from that just described, will be disqualified.

The mousetrap spring and the portion of the trap board to which the spring is attached may not be altered in any way. The trap restraining arm and other portions of the board may be modified. In no case should the spring move through an angle of more than 180 degrees.

The mousetrap must be contained in the vehicle and must propel the vehicle by means of a wheel or wheels in contact with the ground. A launcher or device that pushes the vehicle is prohibited.

One wheel of the vehicle must remain in contact with the ground at all times. The vehicle must remain as a single unit at all times. The vehicle must have a mass of at least 0.5 kg. The vehicle must be started from a standstill by releasing the mousetrap spring in a manner that imparts no additional energy to the vehicle, i.e., the vehicle may not be given a push start. There will be a five-minute time limit to prepare and race your vehicle on the day of the Physics Olympics.

The racecourse will consist of a hard, smooth, level surface with lanes for individual vehicles each 10 meters long and 2 meters wide. The time interval required for each vehicle to cover the 10 meters will be measured from the time the leading edge of the vehicle's front wheel breaks the plane of the starting line to the time the leading edge of the same wheel breaks the plane of the finish line. If the vehicle does not travel the entire 10 meters, then the distance traveled from the start will be used to determine the vehicle's score. If the vehicle leaves the lane from either side, it will be considered stopped when it breaks the plane of the lane boundary.

Scoring: 20 points will be awarded to each team that shows up with a viable vehicle.

40 points will be awarded to each vehicle completing the 10-meter distance. If a vehicle completes a fraction of the full distance, the corresponding fraction of 40 points will be awarded.

Vehicles completing the 10-meter distance will be awarded up to 40 additional points based on the time required to complete the distance. The overall fastest time of the day for the entire field of entries will be divided by an individual vehicle's finish time to determine the fraction of 40 points awarded to that vehicle. The standing overall fastest time will be posted for reference while the competition is in progress.

Each vehicle will be allowed to complete two runs. The vehicle's best time/distance will then be used to determine its score.

RUBBERBAND BOAT RACE

Objective: To construct a boat powered only by rubber bands that traverses a distance of 6’4” in the shortest period of time.

Apparatus: Each team is responsible for designing and building one rubberband-powered boat prior to the day of the competition. SFASU will provide the tank, timing system, and two rubber bands each approximately 6" in circumference.

Regulations: The SFASU rubberbands are to provide the sole source of power for the boats. No other stored energy supplies including gravitational potential energy may be used. Each boat must fit in a box that is 4” by 4” by 8” prior to the race.

Racecourse: The course will consist of an 8’ by 3’ by 5” trough filled with water. The starting gate will be placed 10” from one end of the trough and the finish gate will be placed 10” from the other end.

Scoring: 1. The boat will be released by one member of the team from the end of the trough nearest the starting gate. The launcher must release the boat without providing it any force.

2. The timer will start when the front of the boat crosses the starting line and end when the front of the boat crosses the finish line.

3. The boat may hit the sides of the trough or take on water without disqualification, but all parts of the boat must finish together.

4. The boat must remain in contact with the water at all times.

5. The winning boat will be the one that finishes the course in the shortest time. In the event of a tie, another set of time trials will be run using the same boats to break the tie. No repairs or modifications will be allowed for re-trials.

EGG DROP

Objective: To design a container that will protect a Grade A Large egg from a fall of about 13 meters (3 stories) onto a concrete surface of area approximately 3 m x 2.5 m.

Apparatus: Each team will construct one container before the day of the competition. Each team will be responsible for the secrecy of their design. We will provide the eggs and they will be raw.

Regulations: The container must be able to fit inside a box of dimensions 40 cm x 40 cm x 40 cm. Its mass must be less than 1 kg. The container may be constructed of any kind of material. There will be a five-minute time limit to load the egg into your container on the day of the Physics Olympics.

Procedure: The container will be dropped from a hinged board, extending from a balcony over a concrete surface. The container does not have to survive the fall, but the egg must. A cracked or broken egg will disqualify the entry. The judge will inspect the egg within one minute of the drop. Only one drop will be made for each team's device.

Scoring: Scoring will be based on the following equation: Score = Mass + (10 * Time)

where Mass = mass of the egg container in grams (not including the egg) and

Time = time in seconds from release of the device till its impact.

The device with the lowest score is the winner.

EGGSTRACTION

Objective: To design a device operated by one person that will extract a Grade A Large egg from the middle of a 4.25-meter radius circle.

Apparatus: Each team will construct the device before the day of the competition. Each team will be responsible for the secrecy of their design. We will provide the eggs and they will be raw.

Regulations: The device may be constructed of any kind of material. Participants can use pulleys, motors, carts, remote control vehicles, etc. to move the egg outside of the circle. The operator cannot touch the pavement within the 4.25-meter radius circle and cannot enter the space above the circle (an imaginary vertical cylinder). If a participant enters this cylinder the judge will stop the extraction and call “fault”. Two faults result in disqualification.

Procedure: The circle will be outside on a concrete pavement like a tennis court or on a gym floor. One team member will place the egg in the center of the circle. Another team member will retrieve the egg from the device once it is outside of the circle and hand it to a judge. The judge will inspect the egg within one minute of the extraction. Only one extraction will be made for each team's device. Each team will have five minutes to set up the device before the clock starts. No part of the device may be inside the imaginary cylinder before the clock starts.

Scoring: Scoring will be based on time to complete the task. The team with the shortest time is the winner. Tiebreakers will be based on creativity.

TREBUCHET

A trebuchet is a medieval engine for hurling heavy projectiles.

Objective: To vault an object, a softball, as far as possible using only gravity.

Regulations:

1. The device must be made of wood, non-elastic fabric, rope, duct tape and wood glue.

2. No springs or elastic materials may be used.

3. Lubricants can be used.

4. There can be no metal parts of any kind including bolts and nails.

5. Rocks and bricks can be used only for the counterweights.

6. Only rocks and bricks can be used for the counterweights.

7. The device can only be powered by a descending counterweight.

8. Participant cannot touch the trebuchet once the counterweight is released.

9. The total weight of the device (including the counterweight) cannot exceed 100 pounds.

10. SFA will provide the softballs to be launched on a grass field.

11. If a trebuchet poses any threat to safe competition, the judges reserve the right to disqualify it.

12. No practice launches will be allowed on the day of the Physics Olympics. So be sure to test your trebuchet in advance. There will be a five-minute time limit to prepare your trebuchet for launch on the day of the Physics Olympics.

Scoring: Scoring will be base on the distance from a line in front of the trebuchet to the first impact point of the softball.

WATER ROCKET

Objective: To build a rocket from a 2 liter plastic soft drink bottle.

Regulations: 1. You are to build a rocket from a 2-liter soft drink bottle that uses water and compressed air as a propellant. You are to employ only a bicycle tire pump to pressurize the rocket. As an example, you may fit a rubber stopper with a basketball needle through it into the bottle and attach the tire pump to the needle.

2. Your launch mechanism must safely hold the pressurizing mechanism and contain any stopper or plug that is ejected by the rocket upon launching.

3. The rocket must have a parachute. The rocket may have a Styrofoam nose cone and cardboard fins.

4. All parts of the rocket must remain together during flight (even the nose cone). No metal parts are to be on the part of the rocket that leaves the ground.

5. Participants are required to wear safety goggles and stay 10 feet away from the rocket during pressurization.

6. Each team must build their own rocket and launch mechanism prior to the competition and bring these materials (goggles, water, etc.) with them. Teams may not share rocket parts, launch mechanisms, or pumps. SFA will only provide the timing systems.

7. Water must be in the rocket before the rocket is pressurized with air. Water cannot be added to the rocket after or during the time at which air pressure is added to the rocket. Air must go directly from the pump to the rocket. There can be no air storage tanks.

8. We suggest that you use extreme care when building and testing your rocket. It is not worth injuring yourself or someone else for this event.

9. Any mechanism or rocket that is deemed unsafe by the safety committee will be disqualified.

10. No practice launches will be allowed on the day of the Physics Olympics so be sure to test your rockets and equipment in advance.

Scoring: Scoring will be based upon the time aloft, the time from when the rocket is launched to the time it strikes the ground. You might want to consider a good parachute!