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Uniform Circular Motion Read pages 234 and 235 and study this figure. v=v2-v1 a = v/t Question 5. If you answered questions 3 and 4 correctly, state so. If not, write the correct answers. Study the rest of the slides, along with your textbook pages 236-239. Take notes on the same sheet of paper that you have used to answer questions 1-5. This completed work will be your entrance ticket to the lab. Be prepared to demonstrate your understanding of the vocabulary and concepts before you are permitted to do the lab. Uniform Circular Motion v- tangential velocity a- acceleration directed toward the center of the circle Uniform Circular Motion Centripetal acceleration (ac ) “Center-seeking” acceleration ac is perpendicular to the tangential velocity Dynamics of Uniform Circular Motion What force causes an object to have centripetal acceleration? Centripetal force, Fc - net force necessary to cause centripetal acceleration. Dynamics of Uniform Circular Motion Centripetal force is directed toward the center of the circle. Centripetal vs. Centrifugal Force Read pages 238 -239 and answer the questions: 6) If centripetal means “center seeking”, what does centrifugal mean? 7) Does centrifugal force really exist?Explain. Centripetal vs. Centrifugal Force If there was a centrifugal force, what direction would the ball travel when the string broke? If there was a centrifugal force, the ball would fly outward