1. What is friction? (4 points)

2. What two factors determine the amount of friction? (4 points)

3. What is static friction? (4 points)

4. What is kinetic friction? (4 points) Friction Simulation Questions

5. Click and drag either the books or the side of the atom to the side. Why does nothing happen when the yellow atoms are not in contact with the green? What happens when they do make contact? (4.8 points)

6. Look at the thermometer to the right while rubbing the books together. What happens to the atoms as the temperature increases? As it decreases? (4.8 points)

7. Reset the simulation. Rub the books together to lose some atoms. Why don't the lost atoms come back? (4.8 points)

8. What would happen if you rubbed two dried, wooden sticks together? (4.8 points)

9. Can this concept be applied to other objects? If so, give examples. (4.8 points) Lab Questions

10. In three to five sentences, describe the experiment with the two toy cars. Remember to use proper grammar and mechanics when writing your sentences. (20 points)

11. In three to five sentences, describe the results of the experiment with the two cars. Be sure to explain the reason for the results. Remember to use proper grammar and mechanics when writing your sentences.

12. In the Simple Friction Experiments video, friction was examined using a calculator. Which way was it easier to move a calculator across a table with one finger? Why?