(3) 1-D Motion

# (3) 1-D Motion - Lecture 3 1D motion ACT: Cross product...

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Lecture 3 1D motion

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ACT: Cross product Vectors A, B and C are on the plane of the screen. They are drawn to scale. Compare the magnitude of these two cross products: A. | A × B | > | A × C | B. | A × B | = | A × C | C. | A × B | < | A × C | A B C Bsin θ Bcos θ And they both point out of the screen. θ | A × B | = AB sin θ = AC = | A × C | The cross product selects the part of B that is perpendicular to the direction of A .
An overview of Mechanics Mechanics: study of the motion of objects. 1. Kinematics : How do things move? 2. Dynamics : Why do things move? 4. Some special cases: Rigid body motion Simple harmonic motion •Gravitational forces, Hooke’s law… 3. Conservation laws : Work-energy Momentum (linear and angular) For some problems, the math is easier to handle with

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The Simplest Case: 1D Motion along a Straight Line Position: A single + or – number (coordinate) describes the location of an object relative to a reference point (origin ). Description of motion
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## This note was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Fall '08 term at Iowa State.

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(3) 1-D Motion - Lecture 3 1D motion ACT: Cross product...

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