Forces

1. Effects

1.1. Changes in shape

1.1.1. Pressure

1.2. Alteration of state of movement

2. Machines

2.1. Pulley

2.2. Lever

3. Measurement

3.1. Vectors

3.1.1. Direction

3.1.2. Sense

3.1.3. Aplication point

3.1.4. Intensity (module)

3.2. Newtonmetter

3.2.1. Units to measure force in I.S units = Newtons (N)

4. Forces in nature

4.1. Magnetic forces

4.1.1. Attractive

4.1.2. Repulsive

4.2. Frictional forces

4.3. Gravitational forces

4.3.1. Weight W=mg

4.3.2. Attractive forces

4.3.3. Grouping and movement of celestial bodies

4.4. Electrical forces

4.4.1. Attractive

4.4.2. Repulsive