Friction
The force that opposes motion between two surfaces that are touching
Real World Example
Imagine trying to walk across a floor covered in scattered marbles. Just as those marbles make it difficult for you to move forward smoothly, friction opposes the movement between two surfaces in contact. In this analogy, your feet are like one surface, the marbles represent the roughness of the other surface, and your struggle to move mirrors how friction resists the motion, highlighting the challenge of overcoming opposition to achieve movement.
Real World Example Illustration
Practice Version
