EDEXCEL PHYSICS NOTES FOR UNIT 1 has been attached: If there are any doubts, do comment and ask them out. Notes are about Motion & forces: Physics notes for motion and forces . Physics unit 1 notes excerpt: available for download. SPEED: Average speed of an object can be defined by the following equation: average speed (m/s) = distance covered in metres(m); time taken to cover distance in seconds(s). Speed and velocity: The speed is defined above, Whereas, the word velocity, is defined as speed in a particular direction – for example a bus has a velocity of 30 m/s in a forward direction. Definition: velocity is a speed in a particular direction. Distance–time graphs: When an object moves along a straight line, we can represent how far it has moved using a distance–time graph. Graph below: is a distance–time graph for a runner. She sets off slowly and travels twenty m in the first ten seconds. She then speeds up and travels the next twenty ...
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