Acceleration refers to the rate at which an object's velocity changes over time. It can be positive (speeding up), negative (slowing down), or zero (constant velocity).
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Velocity: Velocity is a vector quantity that includes both speed and direction. Acceleration affects velocity by changing either its magnitude or direction.
Force: Force causes acceleration according to Newton's second law, which states that force equals mass times acceleration.
Deceleration: Deceleration refers specifically to negative acceleration when an object slows down.