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10. Friction and drag

Experiments

Here are experiments our science specialists have selected to support the IB* topic.

Static and Kinetic Friction

Experiment #12 from Physics with Vernier

• Use a Dual-Range Force Sensor to measure the force of static and kinetic friction.
• Determine the relationship between force of static friction and the weight of an object.
• Measure the coefficients of static and kinetic friction for a particular block and track.
• Use a Motion Detector to independently measure the coefficient of kinetic friction and compare it to the previously measured value.
• Determine if the coefficient of kinetic friction depends on weight.

Air Resistance

Experiment #13 from Physics with Vernier

• Observe the effect of air resistance on falling coffee filters.
• Determine how air resistance and mass affect the terminal velocity of a falling object.
• Choose between two competing force models for the air resistance on falling coffee filters.

Refining the Air Drag Model

Experiment #7 from Vernier Video Analysis: Motion and Sports

In this experiment, you will

• Measure and compare the terminal velocity of six stacks of falling coffee filters of varying mass.
• Evaluate how well theÂ FdragÂ = â€“bvÂ model for air drag force describes the motion of the falling coffee filter as mass changes.
• Refine the air drag model to better fit experimental data.

Analysis of Running with Resistance

Experiment #8 from Vernier Video Analysis: Motion and Sports

In this experiment, you will

• Use video analysis techniques to obtain position, velocity, and time data for a person sprinting with and without running parachutes.
• Analyze the positionÂ vs. time and velocityÂ vs. time graphs for the runner as they sprint with increasing amounts of drag.
• Use video analysis techniques to obtain position of the foot data for a runner as they sprint with increasing amounts of drag.
• Determine step rate, cadence, and stride length for a person sprinting with increasing amounts of drag.
• [Extensions] Create and analyze your own video of a person sprinting with increasing drag.

Educational Standard
International Baccalaureate (IB)
Subject
Sports, Exercise, and Health Science
Section
Core
Topic
10. Friction and Drag

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.