Definition: A champ électrostatique uniforme is characterized by direction (D), sense (S), and magnitude (N) that remain constant throughout the field.

Example: The electric field strength (E) between parallel plates is calculated using E = U/d, where U is potential difference and d is distance.

Highlight: The electrostatic force Fe = qE shows the direct relationship between charge $q$ and electric field strength (E).

Vocabulary: Electric field strength is measured in V/m (volts per meter), while charge is measured in Coulombs (C).

Definition: The gravitational force between two objects is described by the universal gravitational constant G = 6.67 × 10⁻¹¹ N·m²/kg².

Example: The calculation of weight (P) is demonstrated using the formula P = mg, where g ≈ 9.8 N/kg or m/s².

Vocabulary: Vector notation is used throughout, with unit vectors $||u|| = 1$ indicating force directions.

Highlight: The gravitational force formula FAB = G × (MA × MB)/d² shows how mass and distance affect gravitational attraction.