A tale of friction
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The word friction means opposition. It is quite common word used among us in daily life.It is sometimes easy to mention it as a resistive force. I shall begin with a very simple scenario of friction (or more appropriately frictional force) which we experience almost every moment in our life. If you are walking or playing or ⚽ football, you are obviously experiencing friction; the moment you kick off the football with your foot,it experiences friction during its rolling and this frictional force acts (or oppose) the rolling motion of the football which slows it down and eventually the football comes to rest. Look at this diagram below: Now let's deep dive into the fundamental reason of slowing down of the football: There are only two fundamental forces that come into play; gravity and electromagnetic forces. The gravity (of the earth 🌎) acts everywhere on the football,on your body,on the ground and the earth itself!