1. Which type of friction is the weakest?
A Fluid B. Rolling C. Sliding D.. Static
2. Which of the following has the greatest friction?
A. polished floor B .sandy floor C. tiled floor D. wet floor
3. Which shows that friction is undesirable?
A. pushing furniture C. walking on wet floor
B. lighting a matchstick D. using breaks when approaching a stoplight
4. The boat sailing on the sea slows down. What kind of friction is acting on it?
A. fluid friction C. sliding friction
B. rolling friction D. static friction
5. How can you best reduce friction between the bottom or feet of furniture and the floor?
A. by smoothing the floor
B. by keeping furniture on their place
C. by applying lubricants like wax o the floor
D. by putting wheels or rollers on the bottom or feet of furniture
6 .Which of the following statement is true ?
A. Friction makes an object slide.
B. Gravity pushes an object upward.
C. Force is needed to stop object.
D. An object in motion will remain in motion.
7. Which of the following is an example of increasing friction?
A. polishing the floor C. squirting oil into the door hinge
B. spreading sand on a wet floor D waxing the underneath of ice skates
8. A boy sits on a grassy slope. What force stops him from sliding down?
A. friction B. gravity C weight D. magnetic force
9. What force of friction experienced by a body when it is at rest?
A. fluid friction C. sliding friction
B. rolling friction D static friction
10. What frictional force experienced by the body when it rolls over another?
A. fluid friction C. sliding friction
B. rolling friction D. static friction