3.3 Thinking in models

Example: Free fall

Course element Work Learning activity
Investigation
Hands-on collection of data
Demonstration or experiment in which the students participate and gain concrete experiences
Collection of data and discussion about relevant aspects
Experiment
Demonstration

Log
Presentation

In small groups, students carry out an experiment to determine the acceleration, for example via video analysis.1

Prior to the experiment, students name the relevant state variables and describe the purpose of the experiment. The students work with a number of different time steps Δt and create a data sheet for a number of time steps. Via this table, the gravitational acceleration is determined during each time step.

The results are represented in (y,t)- and (v,t)-diagrams and the average acceleration rate is calculated. Relevant aspects, including accuracy and the assumption that air resistance is negligible, are discussed.