Freefall

Because our school and college labs are set in regions of uniform gravitational field, there are a whole range of practicals that can be carried out to investigate freefall. Using light gates  and viscosity are common ones but there are opportunities for using video analysis software like tracker as well as classic practicals like 'pearls in air'. The usual aim is to verify g as being 9.81 ms^-2 which can lead to interesting discussions about the variation of g at different latitudes and heights above sea level. http://en.wikipedia.org/wiki/Gravity_of_Earth 


Clip from Tracker: Video Analysis and Modelling Tool