How Everything Works
How Everything Works How Everything Works

Question 1: What is deceleration?

Are you accelerating when your speed decreases?
Yes! If you are walking east and you come to a stop, it is because you accelerated to the west! By "deceleration" we mean acceleration in the direction opposite our direction of motion. Thus in a car, when you stomp on the brake and decelerate, you are actually accelerating toward the rear of the car (in the direction opposite its direction of motion).

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