  We show here how to create from digital films using the well-known software
Tracker stroboscopic photos in order to analyze different types of movements.
The advantage of this procedure is that it is possible to analyze the printed
photo or on a computer screen in an intuitive way for the students. After
presenting a historical perspective of the use of stroboscopic photos in
secondary education we discuss several examples: the movement of a remote
control car, an elastic planar collision, the movement of a projectile and also
an experiment in electromagnetism, more specifically, the discharge of a
capacitor measured using an analog multimeter.
