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lecture02 - 5(a is ball(b is rocket(c is dust P5 Which...

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Physics 131 Spring 2008 Dongping Zhong Lecture 2 (Wednesday, March 26) Kinematics Key concepts: constant acceleration motion uniform motion Page 1
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P2 ) ( lim ) ( 0 graph position of slope dt ds dt x d t x t v v t = = = = = v v v v Examples Instantaneous velocity: Instantaneous acceleration: ) ( 2 2 graph velocity of slop dt dv dt x d dt v d a s = = = = v v v
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P3 Motion with constant acceleration: . 2 2 const dt x d dt v d a = = = v v v = 0 ( a if v ., const v = v 2 2 2 1 , 0 ) ( 2 1 at t v x x t if t a t v x vdt x x t a v adt v v i i f i i i t t i f i t t i f f i f i + + = = + + = + = + = + = Uniform motion )
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P4 Examples Three motion diagrams are shown. Which is a dust particle settling to the floor at constant speed, which is a ball dropped from the roof of a building, and which is a descending rocket slowing to make a soft landing on Mars? 1. (a) is dust, (b) is ball, (c) is rocket 2. (a) is ball, (b) is dust, (c) is rocket 3. (a) is rocket, (b) is dust, (c) is ball 4. (a) is rocket, (b) is ball, (c) is dust
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Unformatted text preview: 5. (a) is ball, (b) is rocket, (c) is dust P5 Which velocity-versus-time graph goes with this position-versus-time graph on the left? P6 Which position-versus-time graph goes with this velocity-versus-time graph on the left? The particle’s position at t i = 0 s is x i = –10 m . (1) (2) (3) (4) P7 Which velocity-versus-time graph or graphs goes with this acceleration-versus-time graph? The particle is initially moving to the right and eventually to the left. P8 Rank in order, from largest to smallest, the accelerations a A – a C at points A – C. 1) a A > a B > a C 2) a C > a A > a B 3) a C > a B > a A 4) a B > a A > a C...
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