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International Baccalaureate Physics Physics Olympics

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Students form teams of three. Teams compete in three events. One of the events is a “calculation” event.

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Physics Olympics Students form teams of three. Teams compete in three events. One of the events is a “calculation” event. Make a team of three Show me that you can “calculate.” Sign up with me for your three events. (visit PO website for more info) Plan transportation, meals, shirts, and construction.

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Calculation events Students form teams of three. Teams compete in three events. One of the events is a “calculation” event. –Air track- Centripetal force –Spring constant- Magnetic field –Trajectory* Laser shoot

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Calculation events One of the events is a “calculation” event. –Air track- Centripetal force –Spring constant- Magnetic field –Trajectory* Laser shoot Your team must pre-qualify by solving a related physics problem. Here are some practice problems:

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Air Track Your team must pre-qualify by solving a related physics problem. Here are some practice problems: A 50.0 gram load sits on a gram glider. The glider is 15.0 cm long and is 85.0 cm from a photogate. If a 35.0 gram weight pulls on the glider, how long will the photogate be blocked?

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Air Track

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Centripetal force Your team must pre-qualify by solving a related physics problem. Here are some practice problems: You hang a gram mass from a string and use it to whirl a rubber stopper in a 45.0 cm radius circle. Your partner times 20.0 revolutions in 7.68 seconds. What is the stopper’s mass?

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Centripetal force

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Spring constant Your team must pre-qualify by solving a related physics problem. Here are some practice problems: You hang a gram mass from a spring and observe it oscillate vertically. Your partner times 20.0 cycles in 7.68 seconds. When a different mass is oscillating, the stopwatch reads 9.64 seconds. What is the other mass?

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Spring constant

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Magnetic Field Your team must pre-qualify by solving a related physics problem. Here are some practice problems: You hold a magnetic compass 5.0 cm due north of a wire. When a switch is closed, current in the wire makes the compass deflect 62°. What is the strength of the magnetic field at a distance of 22.0 cm?

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Magnetic Field

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Trajectory Your team must pre-qualify by solving a related physics problem. Here are some practice problems: You work on a 75.0 cm tall table. A marble ball is released from a ramp and rolls along the level table top. Your partner times it with a stopwatch—he says it takes 0.84 seconds to roll a meter. How far from the table will the ball land?

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Trajectory You work on a 75.0 cm tall table. A marble ball is released from a ramp and rolls along the level table top. Your partner times it with a stopwatch—he says it takes 0.84 seconds to roll a meter. How far from the table will the ball land? The ball will be in the air for t = (2y/g) 1/2 t = sec The ball’s speed is v = 100cm / 0.84 sec v = 119 cm/sec The range is v*t Range = 46.5 cm

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*Laser shoot Your team must pre-qualify by solving a related physics problem. Here are some practice problems: You go into a room with a red line on a table and a post-it note on the wall. Position a semicircular dish of water at the end of the line and a tiny mirror 50 cm away so that when a laser beam is aimed down the red line the beam will hit the center of the post-it note. You have 10 minutes.

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