Download Picturing Motion Section 3.1

Picturing Motion
Section 3.1
Physics
Objectives
• Draw and use motion diagrams to
describe motion.
• Use a particle model to represent a
moving object.
Motion Diagrams
• Used to study motion.
• Like a frame in an old movie.
• All the frames are stacked on top of each
other.
• Def: A series of images of a moving object
that records its position after equal time
intervals.
Operational Definitions
•
•
•
•
Speeding up
Slowing down
At rest
Constant speed
Examples of Motion Diagrams
Pg 45 in your textbooks
The Particle Model
• Exactly the same as a motion diagram.
• Instead of a person or picture series, you
just use a dot (particle) to represent the
object moving.
http://www.physicsclassroom.com/Class/1DKin/U1L2b.html
Questions pg. 46
Questions
• Use the particle model to draw a motion
diagram for a runner moving at a constant
speed.
• Use the particle model to draw a motion
diagram for a runner starting at rest and
speeding up.
• Use the particle model to draw a motion
diagram for a car that starts from rest,
speeds up to a constant speed, and then
slows to a stop.
The End