# lecture5 - Kinematics in 2-D (II) Kinematics in 2-D (II)...

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Unformatted text preview: Kinematics in 2-D (II) Kinematics in 2-D (II) Uniform circular motion Tangential and radial components of Relative velocity and acceleration Serway and Jweett : 4.4 to 4.6 a Uniform Circular Motion uniform means constant speed velocity changes (direction changes) acceleration : find by subtracting vectors, then v v v t = v a center 1 v 2 v 1 r 2 r What is the value of v/ t, as t 0 ? Subtract velocities: 1 v 2 v v Compare with displacements: 1 v 2 v 1 r 2 r 1 r 2 r r r r v v = Similar triangles, Note is perpendicular to v r From previous slide: r v r v = t t , v r v a as t 0, 2 r v a c = and so Direction: Since v i s perpendicular to r , a is perpendicular to v So, a is towards the centre of the circle (centripetal)....
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## This note was uploaded on 10/16/2011 for the course ASSADD DWED taught by Professor Wede during the Spring '10 term at Adventista de las Antillas.

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lecture5 - Kinematics in 2-D (II) Kinematics in 2-D (II)...

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