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# 43 - • Each part of every 2D path can be approximated by...

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Physics 140: Winter 2012 Lecture #3 January 18, 2012 Dr. Dave Winn Racquetball Striking a Wall Copyright: Loren M. Winters Mt. Etna Andrew Davidhazy My Office Hours (1416 Randall Lab) Monday 1pm-3pm Tuesday 1pm-3pm

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Another special 2D motion Uniform circular motion, another special case of 2D motion Object traveling at constant speed on a circle needs a force of fixed size, always to motion, to keep moving in a circle a v v a v a v a
How large is the acceleration in circular motion? We can tell just by examining the path Acceleration is big when v is large or the circle is small… i v f v f v i v v r v a t v a r s v v v v s t 2 s

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