The Olympic Events Event #Participants Prior Construction Myspace.void 5 no Marshmallow Engineering 5 Simply Irresistanceable Materials Available Day Points 1st Points 2nd Points 3rd Points 4th Points 5th At games 1 5 4 3 2 1 no At games 1 5 4 3 2 1 5 no At games 1 6 5 4 3 2 Linear Accelerator 5 no At games 1 6 5 4 3 2 Name that Note 5 no At games 1 6 5 4 3 2 Crash Test Dummies 5 yes At games 2 6 5 4 3 2 MPTM 5 yes Before games 2 6 5 4 3 2 Jump 2 no At games 2 5 4 3 2 1 Slow Bike Race 2 no At games 2 5 4 3 2 1 Fermi Questions 5 no At games 2 6 5 4 3 2 Olympic Video 5 yes Before games 1 4 3 2 Olympic Theme Song 5 yes Before games 1 3 2 1 * Video and theme song are optional events which, if produced, must be presented to the Olympic Committee by 3:00 PM on Wednesday, February 11, in room 215 or 217. Specific Event Descriptions and Rules I. Myspace.void: Determine the radius of an unknown spherical void inside a sphere of uniform density. Materials Provided: Sphere with unknown void, excess material from which sphere is constructed, ruler, tape measure, balance, string Time Limit: Five minutes Description: A spherical “void” (negligible mass) will be placed at the center of a rectangular prism constructed from an unknown material of uniform density. A fixed quantity of the material used to construct the rectangular prism will be provided for teams to investigate the nature of the material. Using only the provided materials, teams must determine the radius of the void. Judging: First through fifth place awards will be given to the teams having the five lowest differences between the predicted and actual radius of the spherical void. Physics Connection: Density Planning: Research density, volume, and circumference equations. II. Marshmallow Engineering: Construct a bridge using an unlimited number of provided toothpicks, uncooked spaghetti, and mini-marshmallows to span a 30 cm chasm and support the greatest load per unit mass of building materials. Materials Provided: Round wooden toothpicks, mini-marshmallows, uncooked spaghetti, Time Limit: 5 minutes Description: A 30-cm chasm will be created between two desks. The constructed bridge must be entirely supported by the two desks without use of adhesives or other outside materials. No part of the bridge may touch the floor, team members, or any other surface. Marshmallows may not be melted, moistened, or heated. Marshmallows, toothpicks, and spaghetti may be broken as needed for construction purposes. Teams will have 3 minutes to construct the bridge, after which the judge will measure its total mass. Teams will then place the bridge across the chasm. Teams will attach slotted 100-gram masses to the bridge, one at a time, until the bridge fails. The entire surfaces of all masses must be located within the middle 15 cm of the span. Masses may be loaded on top of the bridge or attached to toothpicks using the slots. After each mass is added, the bridge will undergo a 5-second evaluation period to check for failure. Failure is defined as occurring when any part(s) of the bridge drop into the chasm or any masses drop into the chasm. Middle 15 cm Desk Desk 30 cm Judging: First through fifth place awards will be given to the teams with the five highest scores as determined by the following formula: Score # of 100 g masses (mass of bridge ) 2 Physics Connection: Stress and strain, static equilibrium Planning: Practice using your own materials III. Simply Irresistance-able: Given a piece of conductive paper of known resistance, cut a new piece of paper to match a specified resistance. Materials Provided: 1 cm x 14 cm sample strip of conductive paper, sheet of conductive paper, scissors, ohmmeter, bulldog clips, ruler Time Limit: 5 minutes Description: Each team will be given a 1 cm x 14 cm sample strip of conductive paper. They will connect bulldog clips (of negligible resistance) to the paper 1 cm from each edge so that the distance between clips is 12 cm (see below). They will use a digital ohmmeter to measure the resistance of the strip (to three significant figures) by touching the meter probes to the bulldog clips. They will also be given the sheet of paper from 12 cm which the sample strip was cut (the sheet has 1 cm x 1 cm grid lines). Based upon the sample strip measurement, they will need to determine the size strip of paper to cut from this sheet to match a value that will be given to them (and different from that of the sample strip). They must allow a one cm length at each end of the new strip to connect to the bulldog clips. Also, the new strip must be at least 2 cm wide for at least 2 cm of its length. The cut piece must be a single strip (separate pieces may not be connected together in any way). After cutting the strip, the group must attach the bulldog clips prior to judging. They may not use the ohmmeter at any time other than for the measurement of the original sample strip. The judge will then measure the resistance of the new strip. Judging: First through fifth place awards will be given to the teams with the five lowest differences between the specified resistance and that measured by the judge. Physics Connection: Electrical resistance Planning: Research factors affecting the resistance of a conductor. IV. Linear Accelerator: Walk with a uniform acceleration of 0.5 m/s2 over a linear distance of 4.0 m. Materials Provided: Marked 4.0 m course, stopwatch, acceleration measuring apparatus Time Limit: Five minutes Description: Each team member will be given one opportunity to walk a 4.0 m, linear course, starting from rest, attempting to achieve a uniform acceleration of 0.5 m/s2. Computer hardware/software will be used to plot a graph of velocity versus time. The slope of the best-fit line over the 4.0 m course will be determined, along with the correlation coefficient. The score for each team member will be determined by the following formula: slope 0.5 correlatio n coefficient The lowest score for any of the five team members for will be the team score. Teams with fewer than five members are limited to one attempt per team member. Judging: First through fifth place awards will be given to the teams with the five lowest team scores as described above. Physics Connection: Kinematics Planning: Research kinematics equations and practice walking with uniform acceleration. V. Name that Note: Determine the frequency of the output of an audio signal generator. Materials Provided: Amplified signal generator (set at unknown frequency), speaker, open glass cylinder, closed glass cylinder, water, meterstick, calipers, thermometer Time Limit: Five minutes Description: Using only the materials provided, determine the frequency (in hertz) at which the signal generator is set. Judging: First through fifth place awards will be given to the teams with the five smallest differences between the predicted and actual signal generator frequencies. Physics Connection: Resonance, standing waves in closed pipes, speed of sound, relationship between wave speed, frequency, and wavelength Planning: Practice with tuning forks and glass cylinders. Research equations for standing waves in closed pipes and the speed of sound in dry air. VI. Crash Test Dummies: Build a vehicle which transports and protects its passengers as they travel down an inclined ramp, across a level floor, and crash into a wall. Materials Provided: Ramp, floor surface, wall, two large raw chicken egg passengers, string, scissors Time Limit: Five minutes to prepare passengers for journey Description: The vehicle may be made only from wood or paper, except for the wheels, axles, and connecting hardware. Glue, staples, nails, or similar fasteners may be used in the construction for the purposes of holding the parts together. The vehicle, including its passengers, may be no more than 15 cm in height. The length must be less than 30 cm, and the width may not exceed the length. The vehicle must carry two large, raw chicken eggs whose top must be visible to the judges at all times. The eggs will be held in place by a 40 cm length piece of string provided by the judges (the seatbelt). The seatbelt must not be directly fastened to the eggs by any means (including glue or tape). The restraint system must be designed such that when the seatbelt is removed, the passengers will immediately fall out of their seats when the car is inverted (in other words, the seatbelt must be the primary means of restraint). The front and top surfaces of both eggs must be completely exposed, so that they are restrained only by the seatbelt (provided string). The other sides of the eggs may be touching wood or paper. The car’s length and mass (prior to the addition of passengers) will be measured. The car will be released from rest at the top of a 245 cm x 40 cm ramp inclined at 10˚ to the horizontal. Walls (6 cm high) will be located on each side of the ramp to prevent the vehicle from sliding off. When the car reaches the bottom of the ramp, it will travel a horizontal distance of 1.50 m along a level floor until encountering a solid wall. wall floor ramp The wall will consist of three sections, with the center section having a value of w = 2 and the end sections having a value of w = 1, with the w value being determined by which section of the wall the car strikes. The speed (v) of the car will be determined on the level section just before the car strikes the wall. The team score will be determined by the following formula: ewv , m 2l 2 where e is the egg coefficient (2 if both eggs intact, 1 if either/both eggs cracked but not broken, 0 if either egg is broken), w is the wall value, v is the speed, m is the empty car mass, and l is the car length (measured from bumper to bumper). Judging: First through fifth place awards will be given to the teams with the five highest scores for a single journey. Physics Connection: Impulse and momentum Planning: Build and test car designs using your own eggs. VII. MPTM (Mousetrap Powered Tape Measure): Build a vehicle that will travel exactly three meters along a level, tiled floor surface using a provided mousetrap as its only power source. Materials Provided: One mousetrap (must be obtained from the Olympic committee) Time Limit: Two minutes to prepare vehicle for launch Description: All construction must be completed prior to the event. The only energy source permitted is the mousetrap spring, which may be altered in any way. The vehicle must travel as a complete unit (the mousetrap must travel with the vehicle). The vehicle must start under its own power and may have to cross over floor tape. Each team will be given two attempts, with the best attempt counting as the score. The team will designate a point on the vehicle to be used for a measurement reference. This point will be marked and aligned with the edge of a starting line on the floor. The linear distance from the start line to the finish line will be 4.0 meters. The width of the course will be 1.5 m. Any vehicle that goes out of bounds will be disqualified. Judging: First through fifth place awards will be given to the teams with the five shortest straight-line distances from the marked reference point on the vehicle to the edge of the finish line on the floor after the vehicle has come to a complete stop. Physics Connection: Conservation of energy Planning: Design, build, and test vehicle using provided mousetrap spring and other materials you provide. . VIII. Jump!: Jump off of a chair onto a platform (force plate) such that the maximum impact force per unit body weight is minimized. Materials Provided: Force plate, computer, chair Time Limit: Three minutes Description: Two of the five team members will jump off of a 45 cm high chair onto a force plate located on the floor, a horizontal distance of 30 cm away from the near edge of the chair. A computer will be used to measure the maximum force of impact for each team member. The weight of each of the two team members will also be measured. The ratio of maximum impact force to weight will then be computed for each of the two team members. The team score will be computed by adding the two ratios together. At no time during the jump may any part of the person’s body (or anything touching the person’s body) contact the floor, ceiling, wall, etc.) Also, any jump that does not result in a landing near the approximate center of the force plate will be repeated. Judging: First through fifth place awards will be given to the teams with the five lowest scores. Only one jump will be permitted per team member. Physics Connection: Impulse and momentum, conservation of energy Planning: Practice jumping lightly! IX. Slow Bike Race: Ride a bicycle over a fixed course in the longest interval of time. Materials Provided: One bicycle. Time Limit: None Description: The course will be 15 m long and 0.75 m wide. The course will not be sloped, and will be clearly marked. No part of the competitor's body (or anything touching the competitor’s body, other than the bicycle itself) may touch the floor at any time during the race. The bicycle must maintain forward motion and stay completely within course boundaries at all times. Each team will be given two attempts to complete the course (same or different riders), with the longest time being recorded. Additional apparatus may be added to the rider, but not to the bicycle. Judging: First through fifth place awards will be given to teams with the longest times. Physics Connection: Conservation of angular momentum, stability, and center of gravity Planning: Practice using your own bicycle. Experiment with modifying the rider in some manner. X. Fermi Questions: Estimate the order of magnitude of a quantity which is difficult or impossible to measure. Materials Provided: List of Fermi questions Time Limit: 15 minutes Description: Each team will be provided with a list of Fermi questions. A single sheet of answers will be submitted by each team. All answers must be recorded in order of 4 4 magnitude format (e.g., 10 , not 3 x 10 ). No calculators or reference materials may be used. Judging: Ten points will be awarded for each correct answer and one point will be deducted for each order of magnitude the answer differs from the accepted. The minimum score per question is zero. First through fifth place awards will be given to the teams with the five highest scores on the test. Physics Connection: Estimation, orders of magnitude Planning: Example question: "How many drops of water are there in Lake Erie?" Team would need to estimate the volume of one drop and, knowing the approximate dimensions of Lake Erie, estimate its volume. Divide volume of lake by volume of one drop (use the factor-label method), make sure units are consistent, and round answer to the nearest order of magnitude. Practice multiplying and dividing orders of magnitude without the use of a calculator. XI. Olympic Video: Produce a five-minute video which teaches some physics concept/application at the high school level. Materials Provided: Physics apparatus as requested and available Time Limit: 5 minutes Description: This is an optional event, which will provide the top video teams with additional team points, as outlined in “The Olympic Events” table. Videos must be turned into the committee (room 215 or 217) by Wednesday, February 11. Acceptable video formats are MPEG, .wmv, .avi, or .mov (please use raw video format—do not convert to DVD). Videos will be judged prior to the games and shown to any interested students during the day 1 events. To aide the judges, each video lesson should begin with at statement of the lesson objective(s). Students may choose to teach any topic/application of physics which would be appropriate for physics classes at Dallastown High School. They may use any method/style of presentation to accomplish this goal (e.g., traditional lecture, demonstration, experiment, drama, etc.). Videos containing or implying profanity of any type or inappropriate dress will be disqualified. Judging: Videos will be judged based upon the following criteria: technical quality (quality of props, audio/video clarity, acting ability): entertainment value (holds viewers attention, fun to watch): educational value (quantity/quality of material taught, teaching techniques): physics value (depth and correctness of the physics): 25 pts. 25 pts. 25 pts. 25 pts. First through third place awards will be given to the teams with the top three scores for their videos. Physics Connection: Any physics topic! Planning: Be watching (videos, classroom, etc.) for creative ways to teach physics! XII. Olympic Theme Song: Compose and produce a musical recording that promotes the study of physics and/or the physics Olympics. Materials Provided: None Time Limit: None Description: This is an optional event, which will provide the top teams with additional team points, as outlined in “The Olympic Events” table. Songs must be between one and three minutes in length and recorded as a CD audio file. A written transcript of the song lyrics must also be provided. All songs must be turned into the committee (room 215 or 217) by Wednesday, February 11. They will be judged prior to the games and played as deemed appropriate by the Olympic committee. They may use any artistic style of presentation to accomplish the goal of promoting the study of physics. Songs containing or implying profanity will be disqualified. Judging: Songs will be judged based upon the following criteria: promotional value of lyrics: musical/recording quality: Creativity: 25 pts. 25 pts. 25 pts. First through third place awards will be given to the teams with the top three scores for their song. Physics Connection: Promote the study of physics. Planning: Design and create song. 23rd Annual Dallastown Area High School Physics Olympics February 17 – 18, 2015 Team Registration/Application Form Team Name: ______________________________________ School Name: ______________________ Team Captain:_________________________ Please Print Legibly!!!! Name Science Teacher Number of Prior Years Olympics Experience Shirt Size Note: Any team name which is found to be inappropriate will result in automatic disqualification of all team members from this year’s Olympics! Choose your team name carefully! We, the above members, acknowledge that we have read the Official Rules and Information Packet for the Physics Olympics and agree to adhere to it throughout the games. We also agree to accept all judging decisions as final, without protest. Signed, 1. __________________________ 2. ___________________________ 3. __________________________ 4. ___________________________ 5. _____________________________ Application Deadline: February 4, 2015