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Key fact In a distance–time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.
Lidar measures distance, while radar provides a precise estimate of velocity. This is a bit of an oversimplification, of course.
GCSE AQA Describing motion - AQA Distance-time graphs The movement of objects can be described using motion graphs and numerical values. These are both used to help in the design of faster and ...
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