04_ChapSummary - SUMMARY The goal of Chapter 4 has been to...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
SUMMARY The goal of Chapter 4 has been to learn to solve problems about motion in a plane. General Principles The instantaneous velocity is a vector tangent to the trajectory. The instantaneous acceleration is the component of parallel to is responsible for change of speed. the component of perpendicular to is responsible for change of direction. v r , a r a r ' , v r , a r a r i , a r 5 dv r / dt v r 5 dr r / dt Relative motion Inertial reference frames move relative to each other with constant velocity Measurements of position and velocity measured in frame S are related to measurements in frame by the Galilean transformations: y r 5 y 2 V y t v r y 5 v y 2 V y x r 5 x 2 V x t v r x 5 v x 2 V x S r V r . Important Concepts Uniform Circular Motion Angular velocity and are constant: The centripetal acceleration points toward the center of the circle: It changes the particle’s direction but not its speed. a
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/26/2010 for the course PHYS 021 taught by Professor Dick during the Spring '08 term at GWU.

Ask a homework question - tutors are online