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## International Baccalaureate Physics

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**International Baccalaureate Physics**Physics Olympics**Physics Olympics**• Students form teams of three. • Teams compete in three events. • One of the events is a “calculation” event.**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.**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**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:**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 200.0 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?**Centripetal force**• Your team must pre-qualify by solving a related physics problem. • Here are some practice problems: • You hang a 150.0 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?**Spring constant**• Your team must pre-qualify by solving a related physics problem. • Here are some practice problems: • You hang a 150.0 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?**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?**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?**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 = 0.391 sec • The ball’s speed is v = 100cm / 0.84 sec • v = 119 cm/sec • The range is v*t • Range = 46.5 cm***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.