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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 frictionThis particle will move along this plane with a motion that is uniform and perpetual, providing the plane has no limits....
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