1. Multiple Choice. Choose the letter of the correct answer.

1. What eventually happens to a moving object when it moves along a surface?
A. It will continuously move
B. It will stop immediately
C. It will eventually slow down and stop
D. It will move either to the right or left side and stop




2. Which of the following statements best describesefriction?
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.



3. What kind of friction occurs when objects are not moving?
A. Rolling friction
C. Sliding friction
B. Fluid friction
D. Static friction


4. Why does static friction exist?

A. Because surfaces have imperfections and adhesion occurs between two stationary surfaces.
B. Because surfaces have imperfections but adhesion doesn't occur between the two stationary surfaces.
C. Because surfaces are smoother when you have an object moving on it.

D. Because surfaces are smoother when you move an object into it.

5. A lamp on top of the table is an example of what type of frictiona
A. Rolling friction
C. Static friction
B. Fluid friction
D. Sliding friction

6. What kind of friction is exerted when an object opposes the motion of another object
A. Rolling frictio
C. Kinetic friction
B. Fluid friction
D. Static friction

7. Which of the following is an example of kinetic friction
A. running car
C. water in the dam
B. books on top of the table
D. coins inside the wallet

8. Which of the following statements is true about kinetic friction?
A. It is a friction that occurs when an object rolls across a surface
B. It is a friction that occurs when solid objects move through a fluid
C. It is a friction that prevents the sliding motion between two objects
D. It is a friction that occurs between two objects when one object slides against one another​