1d kinematics – displacement, velocity, & acceleration

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1D Kinematics – Displacement, Velocity, & Acceleration

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1D Kinematics Displacement, Velocity, & AccelerationEssential QuestionsAs this snowboarder moves in a graceful arc through the air, the direction of his motion, and the distance between each of his positions and the next, is constantly changing.

What language should we use to describe this motion?How can we visually represent the motion?

Copyright 2007, Pearson Education, Inc. Publishing as Pearson Addison-Wesley

Copyright 2007, Pearson Education, Inc. Publishing as Pearson Addison-WesleyKinematicsThe classification and comparison of motion the description of how objects move 4 Types of Motion1D KinematicsStraight-line motion

2D KinematicsProjectile motion

Copyright 2007, Pearson Education, Inc. Publishing as Pearson Addison-Wesley1D KinematicsAssumptions: (in analyzing objects in linear motion)the motion is in a straight line (vertical or horizontal)not concerned with why an object is in motion- only how it moves.All objects will be treated like particles.

Motion DiagramsFrames of a movie

Particle Modelmodel the object as if all its mass is at a single pointDraw a motion diagram of the car above

Motion DiagramsDraw:

Compare:

Motion Diagrams

Draw motion diagrams for these examples:Compare these diagrams, what does this show?- type of motionWhat is needed to compare the positions?- a coordinate system

Motion DiagramsCoordinate SystemSign convention

Origin of timeFree to choose

Positive (+)Negative (-)x-axisx>0, right of originx0, above the originy