how does the force of friction come into existence
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Explanation:
Force of friction or frictional force comes into play when a body have a motion or body is in the rest in the rough surface or ground. The direction of frictional forces is opposite of the Applied force on the object.
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Answer: No surface is smooth
Explanation: Friction exists under the condition that no surface is smooth. It is because of irregularities friction occurs between 2 objects. Even when an object seems very smooth it will still have irregularities on a microscopic level. Hence an object can never be perfectly smooth and friction comes into existence.
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