PHY 102 1st Edition Outline of Last Lecture I Galileo a Motion i States of motion ii Rest iii Proof II Rectilinear III Distance equations Outline of Current 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 Current Lecture I Uniformly Accelerated Motion a Which of the following statements most accurately describes the motion of bicycle B in comparison to bicycle A at t 5 seconds i B is going faster than A A ii A is passing 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 IV iii B is speeding up B iv B is moving in the opposite direction of A b Y intercept i In a position time graph the y intercept represents the position at the start of measurement Equations of Motion a Constant Motion a 0 x x0 vavet b Uniformly Accelerated Motion i vinst v0 at ii x x0 v0t at2 iii vinst2 v02 2a x How to solve kinematic problems a Determine the type of motion constant or uniformly accelerated b Identify what you are seeking c Identify the info that you have d Find an appropriate relationship between all the variables e Solve the relationship for the unknown variable f Insert equations including units and solve g Check to see if your solution seems reasonable Graphs of Motion a Constant Motion i PT Graphs 1 Linear 2 Slope velocity 3 Area under the line is meaningless ii VT Graphs 1 Horizontal Lines 2 Slope acceleration 3 Slope 0 4 Area under the line displacement 5 Does not show position b Uniformly Accelerated Motion i PT Graphs 1 Curved 2 Tangent to curve velocity instantaneously 3 Area under the curve is meaningless ii VT Graphs 1 Non horizontal 2 Slope acceleration 3 Slope 0 4 Area under the curve is displacement 5 Does not show position iii If the instantaneous slope is greater at the left of the graph and smaller at the right of the graph the object is slowing down
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