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Type I Projectiles

Type I Projectiles. Objects that are given an initial horizontal velocity, then influenced by gravity (alone). A Shot vs. A Bullet Dropped. Two Bullets: * One fired horizontally * One dropped at the same instant, from the same height Which lands first?.

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Type I Projectiles

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  1. Type I Projectiles Objects that are given an initial horizontal velocity, then influenced by gravity (alone)

  2. A Shot vs. A Bullet Dropped Two Bullets: * One fired horizontally * One dropped at the same instant, from the same height Which lands first?

  3. Ball Dropped from the mast of a moving ship as a projectile • Where would a ball dropped from the mast of a moving ship land? (Assume that the ship’s velocity is constant and air resistance is negligible.)

  4. Air Drop as a Projectile • What would happen to a package dropped from a moving airplane, if air resistance was negligible? • http://www.physicsclassroom.com/mmedia/vectors/pap.cfm

  5. Facts and Concepts for Type I • Horizontally launched • viy = 0 • ax = 0 • ay = 9.8 m/s/s downward (-9.8m/s/s) • Trajectory (path) is one side of an upside down parabola • Vertical displacement (Dy) is neg. (downward) • Impact velocity is faster than launch velocity, and angle of impact is negative (traveling in a direction below horizontal)

  6. Check Your Understanding

  7. Type I ex #1 • A water pistol held horizontally at a height of 1.20m ejects a stream of water that strikes the floor 5.00m from the shooter. • With what speed is the water launched? • With what speed does the water impact the floor?

  8. Type I ex#2 • The shooter from #1 stands on a step ladder so that he can hold the water pistol at a height of 4.8 m. Again he fires (assume same launch velocity as in #1). What is the range of the water?

  9. Practice Problems • WS

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