3. Which of the following surfaces allows objects (e.g. luggage) to slide more smoothly? Why?
1
2
pavement
airport concourse
The smoother the surface on which an object moves, the greater / smaller the friction. Quick Check
4. Do an experiment. Compare the friction acting on a toy car when it moves on different surfaces. Verify if the statement in the ‘Quick Check’ above is correct. Activity Booklet 31
1
2
3
paper
fine sandpaper
coarse sandpaper
Factors that affect the size of friction are: (1) the weight of an object; (2) whether the surface of an object is smooth or rough. e
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