PHY 102 1st Edition Outline of Last Lecture I Uniformly Accelerated Motion a Example b Y Intercept II Equations of Motion III Steps of solving kinematic problems IV Graphs of Motion a Constant motion b Uniformly Accelerated Motion Outline of Current Lecture I Position a Distance b Displacement II Vector III Relationships between velocities IV Acceleration a Relationships V Example Problems Current Lecture I Position magnitude and direction vector from some arbitrary location a Distance track along which something travels b Displacement straight line distance between points A B These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II III Vector magnitude direction a 12 mi N displacement b 12 mi distance c Average speed has to factor in time NOT just total time distance i Ave speed v x t d Speed I velocity I i Vf final velocity ii Vi initial velocity iii V0 original velocity e Tangents to a curved Position Time Graph are instantaneous velocity Relationships between vave and vinst a V v1 vt b A constant x vt c d IV V i v t v 1 x 2 Acceleration a Rate in change of velocity speed or direction b Acceleration is a vector quantity that can be positive negative or zero c Negative acceleration does NOT necessarily mean slowing down d Relationships i If v and a it goes faster in the positive direction ii If v and a it goes slower in the positive direction iii If v and a it goes slower in the direction iv If v and a it goes faster in the direction v Acceleration is in the same direction as the force Examples a A vehicle travels 65s in 28 seconds V x 65 m t 28 s v x t 65 m 28s 2 1 m s b A vehicle accelerates from rest to 22 m s in 4 s A V0 0 m s V 22 m s T 4s V v0 at v v0 at a v v0 t a 22 m s 0 4 a 5 5 m s2
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