to prove with an activity that different surfaces exert different force of friction
Answers
Friction depends on the nature of the two surfaces. It depends on smoothness or roughness of the two surfaces which are in contact of each other. When two surfaces are in contact are smooth, then the friction between them is small because the interlocking of smooth surface is less. When two surface is rough then the friction is more because the interlocking is very strong in very rough surface.
Friction, simply described for students in elementary school is any force that slows or stops motion. In this lab, students compare the force necessary to move the same object over various surfaces. The relative friction produced by these surfaces can be determined and compared. Surfaces producing greater friction require more force to move the object while surfaces causing less friction require less.