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?
Air Track
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?
Centripetal force
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?
Spring constant
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?
Magnetic Field
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.
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