Physics A First Course Forces and Motion Chapter 3

Forces and Motion Conservation Laws 3.1 Newton's Third Law and Momentum 3.2 Energy and the Conservation of Energy 3.3 Collisions

3A Investigation: Momentum and the Third Law Key Question: What makes moving objects keep going at the same speed in the same direction? *Students read text section 3.1 AFTER Investigation 3A

3A Investigation Topics Perform collision experiments. Measure time intervals. Calculate speed using measured time intervals. Calculate momentum. Describe activity using the law of conservation of momentum.

Chapter 3.1 Objectives and Vocabulary Use Newton's third law to explain various situations. Explain the relationship between Newton's third law and momentum conservation. Solve recoil problems. Newton's third law momentum impulse law of conservation of momentum

3B Investigation: Conservation of Energy Key Question: What limits how much a system may change? *Students read text section 3.2 AFTER Investigation 3B

3B Investigation Topics Measure time intervals. Calculate speed using measured time intervals. Measure height. Graph speed vs. height of the car. Calculate potential energy. Use energy conservation to derive a formula for the speed of the car in terms of energy.

Chapter 3.2 Objectives and Vocabulary Describe work and energy. Calculate potential energy. Calculate kinetic energy. Apply the law of conservation of energy to explain the motion of an object acted on by gravity. energy joule work potential energy kinetic energy law of conservation of energy

Chapter 3.3 Objectives and Vocabulary Distinguish between elastic and inelastic collisions. Use momentum conservation to solve collision problems. Explain how momentum, impulse, force and time are related. collision elastic collision inelastic collision