PROJECTILE MOTION 12Opt

# PROJECTILE MOTION 12Opt - PROJECTILE MOTION Senior High...

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PROJECTILE MOTION Senior High School Physics Lech Jedral 2006 Part 1. Part 2. 100’s of free ppt’s from www.pptpoint.com library

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Introduction Projectile Motion: Motion through the air without a propulsion Examples:
Part 1. Motion of Objects Projected Horizontally

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v 0 x y
x y

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x y
x y

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x y
x y Motion is accelerated Acceleration is constant, and downward a = g = -9.81m/s 2 The horizontal (x) component of velocity is constant The horizontal and vertical motions are independent of each other, but they have a common time g = -9.81m/s 2

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ANALYSIS OF MOTION ASSUMPTIONS: x-direction (horizontal): uniform motion y-direction (vertical): accelerated motion no air resistance QUESTIONS: What is the trajectory? What is the total time of the motion? What is the horizontal range? What is the final velocity?
x y 0 Frame of reference: h v 0 Equations of motion: X Uniform m. Y Accel. m. ACCL. a x = 0 a y = g = -9.81 m/s 2 VELC. v x = v 0 v y = g t DSPL. x = v 0 t y = h + ½ g t 2 g

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Trajectory x = v 0 t y = h + ½ g t 2 Eliminate time, t t = x/v 0 y = h + ½ g (x/v 0 ) 2 y = h + ½ (g/v 0 2 ) x 2 y = ½ (g/v 0 2 ) x 2 + h y x h Parabola, open down v 01 v 02 > v 01
y = h + ½ g t 2 final y = 0 y x h t i =0 t f =Δt 0 = h + ½ g (Δt) 2 Solve for Δt:

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## This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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PROJECTILE MOTION 12Opt - PROJECTILE MOTION Senior High...

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