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10. Why do you need to put rollers under the cabinets when you want to move them?
A. To apply more force.
C. To slow down the movement of the cabinet.
B. To stop the movement of the cabinet.
D. To minimize the friction through the small surface of contact of the rollers.
11. Which is NOT a way of reducing friction?
A. Applying Lubricant
C. Making the floor smooth
B. Putting spikes on tires
D. Putting grease on bicycle gears
12. Why do drivers drive their car slowly during rainy days?
A. Drivers drive slowly because the windshield is blurred.
B. Drivers drive slowly because they are afraid of the rain.
C. Drivers drive slowly because the road is wet so there is less friction.
D. Drivers drive slowly because the road is wet so there is more friction.
13. A boy is playing with a toy car. In which surface will it travel faster?
A. Cemented Floor
B. Carpeted Floor
C. Grassy Surface
D. Polished Floor
14. Which of the following shows that the friction could be harmful?
A. Writing on the board
B. Holding a piece of paper
C. Tearing out of bicycle gears
D. Using breaks when stopping
15. A crumpled and uncrumpled paper where dropped at the same height and time, which paper will reach the ground first?
A. The crumpled paper because it has a smaller surface paper.
B. The uncrumpled paper because it has a bigger surface area.
C. Crumpled paper because it is heavier compared to the uncrumpled paper
D. None, because both the crumpled and uncrumpled paper have same masses.
16. Which has the greatest friction?
A. Polished Floor B. Sandy Floor C. Wet Floor D. Tiled Floor
17. The boat sailing on the sea slows down. What kind of friction is acting on it?
A. Static Friction B. Rolling Friction C. Fluid Friction D. Sliding Friction
18. Which of the following statements best describes friction?
A. It is a force that occurs between solids.
B. It is a force that occurs only on rough surfaces.
C. It is a force that occurs between solids and liquids.
D. It is a force that occurs when surfaces touch each other.
19. How can you reduce friction between the bottom or feet of furniture and the floor?
A. By soothing the floor.
B. By keeping the furniture on their place.
C. By applying lubricants like wax on the floor.
D. By putting wheels or rollers on the bottom or feet of the furniture.
20. Which shows that friction is undesirable?
A. Pushing furniture’s
C. Walking on wet floors
B. Lighting a matchstick
D. Using the breaks when approaching a stoplight
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