The Circle Approximation is a mathematical concept used to understand circular motion. It shows that the acceleration of an object moving in a circle is zero, regardless of the size or speed. This approximation can be applied for any type of circular motion and it does not matter if the particle travels at constant velocity or has changing speeds- as long as its direction remains tangential, there will be no acceleration. Number of words: 236 Bullet Point List: – The Circle Approximation is a mathematical concept used to understand circular motion. It shows that the acceleration of an object moving in a circle is zero, regardless of the size or speed. This approximation can be applied for any type of circular motion and it does not matter if the particle travels at constant velocity or has changing speeds- as long as its direction remains tangential, there will be no acceleration. – A particle traveling around a circle at constant speed will not experience an acceleration because centripetal force balances friction with other forces acting on it. For example, when driving your car round a curve you feel more pressure pushing against your back (centrifugal)