acceleration

accélération

Changement de la vitesse à laquelle une chose se déplace.

En anglais simple : A change in how fast something moves.

• The sudden acceleration pushed me into my seat.
• This car offers smooth acceleration.
• Passengers felt the plane’s acceleration during takeoff.

Expressions courantes : sudden acceleration, rapid acceleration, smooth acceleration

accélération

Augmentation de la vitesse d’un mouvement ou du rythme auquel une chose se produit.

En anglais simple : An increase in the speed of movement or in how quickly something happens.

• We noticed an acceleration in growth.
• New equipment allowed the acceleration of production.
• The acceleration of change left many workers struggling to adapt.

Comment l'utiliser : acceleration of something (The acceleration of the project required extra staff.); acceleration in something (The report predicts an acceleration in economic growth.)

Synonymes : speeding up, quickening

Contraires : deceleration, slowdown

Expressions courantes : acceleration of growth, rapid acceleration, economic acceleration

accélération

Quantité dont la vitesse augmente pendant une durée donnée.

En anglais simple : The amount by which speed or velocity increases over a given time.

• The car’s acceleration was two metres per second squared.
• We measured the rocket’s acceleration.
• Greater force produces greater acceleration for the same mass.

Expressions courantes : constant acceleration, average acceleration, acceleration of something, instantaneous acceleration

accélération

Mesure de la rapidité du changement de vitesse ou de direction d’un objet en mouvement.

En anglais simple : The rate at which the speed or direction of a moving object changes.

• We measured the acceleration of the car.
• The force produces an acceleration toward the center.
• Even at constant speed, a change in direction involves acceleration.

Expressions courantes : constant acceleration, acceleration due to gravity