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Discussion-05 - 2D 2DKinematics ProjectileMotion...

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2D Kinematics Projectile Motion 2D Kinematics – Projectile Motion Di i #05 Ch 3 1 3 3 Discussion #05 – Ch. 3.1 – 3.3 Physics 125 – Fall 2010 Dr. Mike Melnichuk [email protected] Office: 2409 Randall Lab [email protected] Office Hours: 2:00 4:00 / Mon & Tue in Rm 1416 Randall Lab Office Hours: 2:00 – 4:00 / Mon. & Tue. in Rm. 1416 Randall Lab.
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Example #1 A battle ship simultaneously fires two shells at enemy ships. If the shells follow the parabolic trajectories shown, which ship gets hit first? 0y v H t d t A) Ship A. B) Ship B. top half-way 0y half-way top 2 top half-way half-way = and v = gt 2 H g H = t and t 2 2 g = C) They will both be hit at the same time. D) Need more information. top total half-way H t 2t 2 2 g = = A B
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Example #2 A motorcycle stunt rider rides off the edge of a cliff. Just at the edge his velocity is horizontal, with magnitude 9.0 m/s. What is the motorcycle’s distance from the origin at t = 0.50 s ? origin at t 0.50 s ?
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