physics a first course forces and motion chapter 2
DESCRIPTION
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 MotionTRANSCRIPT
Chapter 2Physics A First Course Forces and Motion
Forces and MotionLaws of Motion
2.1 Newton's First Law2.2 Acceleration and Newton's Second Law2.3 Gravity and Free Fall2.4 Graphs of Motion
2A Investigation: Law of Inertia
Key Question:
Why are heavier objects harder to start or stop moving?
*Students read text section 2.1AFTER 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
force Newton's first law inertia newton net force
Recognize that force is needed to change an object's motion.
Explain Newton's first law.
Describe how inertia and mass are related.
2B Investigation: Newton's Second Law
Key Questions:
What is force?
What is the relationship between force and motion?
*Students read text section 2.2AFTER 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 acceleration
deceleration Newton's
second law
Define and calculate acceleration.
Explain the relationship between force, mass, and acceleration.
Determine mass, acceleration and force given two of the quantities.
Chapter 2.3 Objectives and Vocabulary free fall
acceleration due to gravity
velocity weight air resistance terminal speed
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.
Chapter 2.4 Objectives and Vocabulary slope 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.