Name: _______________________________
Physical Science
#______
Date: _____________
Class: ___________
Chapter 3 Review Sheet/Study Guide
Know your vocabulary.
Use the following questions to help guide your studying:
1. State Newton’s Second Law of Motion.
2. Explain the following relationships:
F = ma
F = mg  What is “g” on Earth?
w = mg
p = mv
HINT: Know your formula circles and the appropriate units for each!
HINT: Know how to calculate (applying math) any of the above formulas!
3. Define friction.
4. Explain what causes friction.
5. What two things does the force of friction between two objects in contact depend on?
6. Distinguish between the following: static friction, sliding friction, and rolling friction.
7. Infer what will reduce friction between two surfaces.
8. What is air resistance?
9. Define terminal velocity.
10. Compare the force of air resistance and the force of gravity on an object falling at its
terminal velocity.
11. Describe gravity as a force in relation to mass and distance between two objects.
12. Explain the Law of Universal Gravitation.
13. Distinguish between weight and mass.
14. When is an object considered to be weightless?
15. How is weight affected by your location from the center of the Earth?
HINT: Will weight increase or decrease, as you get farther from the center?
16. What are projectiles?
17. Describe the type of path that projectiles travel?
18. Compare and contrast the following:
horizontal motion vs. vertical motion
horizontal distance vs. vertical distance
19. Define centripetal acceleration and centripetal force.
20. State Newton’s Third Law of Motion.
21. List examples of action-reaction forces.
22. Why don’t action-reaction forces cancel?
23. What is momentum?
24. Explain how momentum is transferred? How momentum is conserved?