Chapter 2: Kinematics in One Dimension

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Presentation transcript:

Chapter 2: Kinematics in One Dimension Essential Concepts and Summary

Displacement Displacement is a vector pointing from an objects' initial position to its final position, and has a magnitude equal to the shortest distance between the points SI Unit: meter

Speed and Velocity Average velocity is the change in displacement over change in time. Average speed is change in distance over change in time. Velocity has direction, speed doesn't

Acceleration Average acceleration is the change in velocity over a change in time

Kinematics for Constant Acceleration These set of four equations apply when an object moves with constant acceleration along a straight line

Derivation

Freely Falling Bodies Idealized motion, where air resistance is neglected and acceleration is nearly constant, is referred to as free-fall. Acceleration due to gravity on earth, g, is 9.80 m/s2 Kinematics equations are the same but a = g

Graphical Analysis Slope of position vs. time plot is velocity Slope of velocity vs. time plot is acceleration The area underneath a velocity vs. time plot is distance

Summary of Equations