#3.2.2a
drag as the frictional force experienced by an object travelling through a fluid
#3.2.2b
factors affecting drag for an object travelling through air
#3.2.2c
motion of objects falling in a uniform gravitational field in the presence of drag
#3.2.2d
(i) terminal velocity
(ii) techniques and procedures used to determine terminal velocity in fluids.
PAG1 - e.g. ball-bearing in a viscous liquid or cones in air.