Definition: Translational kinetic energy is defined as Ec = ½mv², where m is mass in kilograms and v is velocity in meters per second.

Vocabulary: Angular velocity (vitesse angulaire) is measured in radians per second and is crucial for rotational kinetic energy calculations.

Example: Rotational kinetic energy is calculated using the formula Ec = ½mR²ω², where R is the radius in meters and ω is the angular velocity.

Highlight: The relationship between translational and rotational kinetic energy demonstrates how energy manifests differently in various types of motion.

Definition: Average power is measured in watts (W) and represents the rate of energy transfer over time.

Vocabulary: Instantaneous power (puissance instantanée) refers to the power at a specific moment, calculated as the derivative of energy with respect to time.

Example: The relationship between energy and power is demonstrated through the integral formula: E(t) = ∫P(t)dt

Highlight: The efficiency (rendement) calculation is introduced as the ratio of useful energy to absorbed energy: η = E(utile)/E(absorbée)