Give an example to show that friction is an important factor in satisfying Newton's third law of motion.

(N/A) Walking is a classic example. When a person walks,they push the ground backward with their feet (action). According to Newton's third law,the ground exerts an equal and opposite force on the feet (reaction). This reaction force is provided by the friction between the soles of the shoes and the surface of the ground. Without friction,the feet would slip,and it would be impossible to exert the necessary backward force to move forward.