Lecture4

Lecture4 - Lecture 4 Chapter 2: Motion in one dimension...

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Unformatted text preview: Lecture 4 Chapter 2: Motion in one dimension Last Time • Finished chapter 1 Scalars Vectors Addition Subtraction Multiplication of a vector by a scalar Multiplication of two vectors Vector Components • Chap 1 HW solutions are posted Motion • Chapter 2 will focus on motion in 1 dimension Describe motion using concepts of space and time – kinematics Ex. Driving • Any description of motion involves three concepts: Displacement Velocity Acceleration Displacement • Nearly the frst thing you must do in every physics problem is defne a coordinate system • For one dimensional motion, Choose an origin Choose a positive direction +x O Displacement • x is defned as the position compared to the origin • Displacement, Δ x, is the di f erence between two positions • Δ x = x 2-x 1 or Δ x = x F-x i • Distance, d, is the total length traveled. d can only be a positive value (not a vector) Note: Particle Description • Motion of an object through space can be quite complicated… Friction Internal Motion Rotation • Use a simpli¡ed model Particle model Details that are not that signi¡cant in determining the outcome of the problem are ignored Position-Time Graph The position-time graph shows the motion of the particle (car) The smooth curve is a guess as to what happened between the data points 2-D Variables...
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This note was uploaded on 01/25/2012 for the course EE ee taught by Professor E during the Spring '11 term at UCSD.

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Lecture4 - Lecture 4 Chapter 2: Motion in one dimension...

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