# Lecture 3 - Physics 140 Winter 2008 Lecture#3 Dr Dave Winn...

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Unformatted text preview: Physics 140: Winter 2008 Lecture #3 January 10, 2008 Dr. Dave Winn Racquetball Striking a Wall Copyright: Loren M. Winters Mt. Etna Andrew Davidhazy Basics of 2D motion • Components of net acceleration along motion speed things up • Components of net acceleration opposite motion slow things down • Components of net acceleration perpendicular to motion turn things a r This is a map of the Rio de Janeiro Grand Prix course. If the motorcyles travel at constant speed around the track, where do they experience the largest accelerations? 1: Morette 3: Vitoria 5: Juncao 2: Molykote 4: Nonato Projectile motion • Simple 2D motion with only one constant acceleration • Start by leaving out air friction so the only force is gravity • Gravity is constant, and always downward • It will affect only the vertical motion • Galileo provided the first accurate explanation: I propose to set forth those properties which belong to a body whose motion is compounded of two other motions, namely one uniform and one naturally accelerated….This is the kind of motion seen in a projectile….Imagine any particle projected along a horizontal plane without friction…This particle will move along this plane with a motion that is uniform and perpetual, providing the plane has no limits....
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Lecture 3 - Physics 140 Winter 2008 Lecture#3 Dr Dave Winn...

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