Physics A First Course Forces and Motion Chapter 2.

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Presentation transcript:

Physics A First Course Forces and Motion Chapter 2

Forces and Motion Laws of Motion 2.1 Newton's First Law 2.2 Acceleration and Newton's Second Law 2.3 Gravity and Free Fall 2.4 Graphs of Motion

2A Investigation: Law of Inertia Key Question: Why are heavier objects harder to start or stop moving? *Students read text section 2.1 AFTER Investigation 2A

2A Investigation Topics Launch cars of different mass. Measure time intervals. Calculate speed based on measured time intervals. Graph speed vs. mass. Research and define terms: inertia, weight and mass.

Chapter 2.1 Objectives and Vocabulary Recognize that force is needed to change an object's motion. Explain Newton's first law. Describe how inertia and mass are related. force Newton's first law inertia newton net force

2B Investigation: Newton's Second Law Key Questions: What is force? What is the relationship between force and motion? *Students read text section 2.2 AFTER Investigation 2B

2B Investigation Topics Measure time intervals of car moving along track. Calculate and compare speeds of car at different points on track. Evaluate forces acting on car. Calculate acceleration of car. Use Newton's second law to calculate the force. Graph force vs. time for the car on the track. Explain how speed and acceleration are different using graphs.

Chapter 2.2 Objectives and Vocabulary Define and calculate acceleration. Explain the relationship between force, mass, and acceleration. Determine mass, acceleration and force given two of the quantities. acceleration deceleration Newton's second law

Chapter 2.3 Objectives and Vocabulary Describe the motion of an object in free fall. Calculate the speed and distance for an object in free fall. Distinguish between mass and weight. Explain how air resistance affects the motion of objects. free fall acceleration due to gravity velocity weight air resistance terminal speed

Chapter 2.4 Objectives and Vocabulary Describe motion with position versus time and speed versus time graphs. Use a position versus time graph to calculate speed from the slope. Use a speed versus time graph to calculate acceleration and distance traveled. slope