ESS 3301 Lec 6 - Projectile Motion II - Flight

ESS 3301 Lec 6 - Projectile Motion II - Flight -...

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Announcements Announcements Exam 1 update Bouncing (1) and Jumping (2) Problem Sets 4 & 5 and keys posted
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Projectile Motion II Projectile Motion II Flight Flight ESS 3301-003 Lecture 6 Reading: McGinnis Ch 1, 2, 3
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Projectile Motion Projectile Motion Projectile motion refers to objects moving in the air Projectiles are Airborne Objects - Thrown Implements e.g. Balls, discus, shot - Animals (this includes humans and dwarfs) e.g. Object during flight phase of jumping, diving, gymnastics, aerials “No man will ever throw a dwarf”
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Projectiles Projectiles Once an object leaves the ground, only two forces act upon it. Gravity -9.81 m/s 2 Acts downward vertically Air Resistance Important in discus, ski diving, ski jumping Large velocity, long flight time, and aerodynamic implements Usually considered or assumed 0 m/s 2 or minimal for many activities Short flight times or negligible effects of drag (e.g. vertical jump) Air resistance acts in all directions
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Factors Directly Affecting Trajectory Factors Directly Affecting Trajectory Projection Angle Take-off angle Projection Velocity Take-off velocity Horizontal Component Vertical Component Projection Height Height of take-off
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Affects of Take-off Height Affects of Take-off Height S Vert. Ground S Vert. Bench S Hor. Bench S Hor. Ground
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Constant Acceleration Constant Acceleration Equations of Motion Equations of Motion v f = v i + a·t This is simply a rearrangement of: s = v i ·t + ½·a·t 2 v f 2 = v i 2 + 2·a·s 2 Notes : 1) Sometimes you see u for v i and v for v f 2) Sometimes you see “d” or “p” rather than “s” t v a = t v v a i f - =
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Example Calculations Example Calculations Given: Ball projected from the ground Flight time is 1.4 seconds How high did the ball go?
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This note was uploaded on 10/24/2011 for the course BIOLOGY 1402 taught by Professor Held during the Fall '11 term at Texas Tech.

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ESS 3301 Lec 6 - Projectile Motion II - Flight -...

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