Physical Science Chapter 7: Force and Newton's Laws

Vocabulary Words	Objective Questions
7-1  Newton's First Law	page 194
force net force balanced forces Newton's first law of motion friction static friciton sliding friction rolling friction	How can a force be exerted? What happen when two forces act in the same direction? What happens when two forces act in opposite directions? Why  is Newton's first law important? What are the three kinds of friction.  Give an example of each. What do the different forms of friction have in common?
7-2  Newton's Second Law	page 200
Newton's second law of motion newton centripetal force air resistance	What is gravity? What two things does the force of gravity depend on? What is the difference between weight and mass? In circular motion, what force acts upon the object? What is the equation that shows the acceleration of an object due to net force? Describe satellite motion. Include a picture illustrating your answer. Visit this website: http://www.mcanv.com/p1aso.html What is terminal velocity? Can you change your terminal velocity?  Explain.
7-3 Newton's Third Law	page 207
Newton's third law of motion action-reaction pairs free fall weightlessness	Give three examples of action-reaction pairs. Why don't action-reaction pairs cancel each other out? How do we use action-reaction pairs? What are the action-reaction pairs in a rocket launch? Are astronauts really weightless? Why?

Be able to write down from memory Newton's Three Laws of Motion!!!!
Science and Society:  Air Bag Safety page 216-217