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   ocr: What is friction? FRICTION FORWARD e FORCE Ifyou're cycling along a level road, you'll know that you soon come to a halt if you stop pedalling. This is because a force called triction resists the motion of your bike. Friction opposes the movement of objects sliding over each other, pushing in the opposite direction to the way chat an object moves. Without friction, moving objects would continue to move without being pushed. Friction occurs because no surface is perfectly smooth, however flat it mayl look. All substances, even liquids and gases, create friction. Friction increases as the pressu ...