Final answer:
Friction is the force that slows down and stops a marble on a flat surface, with smoother surfaces causing objects to slide farther.
Explanation:
Friction is the force that eventually slows down and stops a marble rolled on a flat surface. When a marble interacts with the surface it rolls on, such as concrete or a tabletop, friction occurs, which opposes the motion of the marble, causing it to decelerate and come to rest.
Galileo's observations led to the understanding that on smoother surfaces like ice, objects slide farther due to less friction, while rough surfaces result in quicker stops. Understanding friction is crucial in predicting how quickly an object will slow down when in motion.
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