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GCSE Combined Science · key term
A decrease in speed; acceleration acting opposite to the direction of motion.
Used by AQA and Edexcel
Specification 6.5.4.1.5, 6.5.4.3.4 · Paper 6
A decrease in an object's speed.
Revise: Calculating accelerationDeceleration means acceleration opposite to the object's motion.
A decrease in speed.
A decrease in speed per unit time; the acceleration acts opposite to the direction of motion.
Paper 5, Paper 6
A decrease in speed; for motion in the positive direction, this corresponds to negative acceleration.
Revise: Acceleration equations and velocity–time graphsIts acceleration is therefore negative; this slowing down is called deceleration.
Keep the sign of acceleration in your working. If asked for the magnitude of deceleration, give a positive value.
A negative acceleration or force indicates a direction opposite to the chosen positive direction. The magnitude of the deceleration or force is positive.
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