Didactic unit about waves and undulatory phenomena for 4 º compulsory secondary education course. What is a harmonic vibration? What is a wave? Superposition of waves. Phenomenon of diffraction. Other properties of waves.

Didactic unit about momentum for 4th of compulsory secondary education. Introduction. Momentum and Impulse. Collisions of particles. Disintegration of particles.

Static teaching unit on the 4th year of compulsory secondary education. Magnitude Forces (or Length), Sense and Components of a Force direction. Effect of various forces. Resulting. Balancing force. Activities.