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Physics Revision ­ P3
Speed = rate of change of distance. Speed = Distance / Time
Distance = Speed * Time
Time = Distance / Speed
Distance Time graphs = Displays data on distance and time. To calculate each gradient use the
equation speed = distance / time.

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Reducing Forces = When a car moves it has kinetic energy. When a car suddenly stops, the kinetic
energy needs to be absorbs safely and slowly enough reduce injuries. Crumple zones do this. They help
reduce injuries by changing the shape and absorbing energy through progressive, controlled and


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