Activity 2: Move My Sticky Brain
Objective: Describe how friction affects motion.
What to do: Read each item carefully. Encircle the letter of the correct answer.
1. Which of the following is the best description of friction?
A. Friction is a force.
B. Friction is never useful.
C. Friction is needed to make us
stand still.
D. Friction is a force between two bodies which are in contact with each other.
2. A girl sits on a grassy hillside. Which force stops her from sliding down?
A. air resistance C. friction
B. force D. gravity
3. On which surface would a push car travel the fastest?
A. carpet C. sand
B. tiled floor D. sandpaper
4. On which surface would a push car travel the slowest?
A. carpet C. wooden floor
B. ice D. tiled floor
5. Which statement is TRUE?
A. The rougher the surface, the greater is the friction.
B. The rougher the surface, the same level of friction.
C. The rougher the surface, the lesser is the friction.
D. The rougher the surface, the limited is the friction.
6. Which does not support to the statement, "the smoother the surface is, the lesser friction there will be".
A. oiling a bike
B. waxing the floor
C. oiling a car engine
D. moving table in a cemented floor
7. All materials below can help reduce friction EXCEPT ______.
A. ball bearings C. sand
B. lubricants D. wax
8. If you polish a wooden floor, what will happen?
A. Friction will decrease.
B. Friction will increase.
C. Friction makes you float.
D. Friction remains the same.
9. Which of the following has a greater friction?
A. polished floor C. tiled floor
B. sandy floor D. wet floor
10. Which of the following shows that friction is undesirable?
A. lighting matchsticks
B. pushing furniture
C. walking on the wet floor
D. using brake when approaching a road intersection​