Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15Ld6KabsL9x9X-t4GefBgSzXFDckJFa6 1.5 Forces continued 1.5.2 Friction 1 Describe friction as a force that may impede motion and produce heating 2 Understand the motion of objects acted on by a constant weight or driving force, with and without drag (including air resistance or resistance in a liquid) 3 Explain how an object reaches terminal velocity 4 Define the thinking distance, braking distance and stopping distance of a moving vehicle 5 Explain the factors that affect thinking and braking distance including speed, tiredness, alcohol, drugs, load, tyre surface and road conditions 1.5.3 Elastic deformation 1 Know that forces may produce a change in size and shape of an object 2 Define the spring constant as force per unit extension; recall and use the equation spring constant = force extension k = Fx 3 Sketch, plot and interpret load–extension graphs for an elastic solid and describe the associated

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