5. Projectile Motion - Galileo and Einstein

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Hang Time• How long does it take theball to go up <strong>and</strong> come backdown again?• Initial upward velocity v 0y ,upward velocity changes by–g each second, back downat –v 0y , so gt = 2v oy• Hang time:t=2v0yghttp://curlyr.blogspot.com/2008_09_01_archive.html

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RangeA• Given the initial velocityv = v v( , )0 0x0yThe Paris gun, used by the Germanarmy to shell Paris in 1918. Its rangewas about 80 miles, 130 km.• The hang time is0 y<strong>and</strong> during that time the shelltravels a horizontal distance0x 0x 0y• This is the range.t = 2 v / gR= v t = 2 v v / g.http://en.wikipedia.org/wiki/File:Parisgun2.jpg

Page 1 and 2: ProjectilesPhysics 1425 Lecture 5Mi
Page 3 and 4: Galileo’s Law for Projectiles•
Page 5 and 6: Equation for the Trajectory• Taki
Page 7 and 8: Car Goes Horizontally Over Cliff•
Page 9: Vector Picture of Projectile Motion

5. Projectile Motion - Galileo and Einstein

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