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Lecture Notes Chapter2

# Lecture Notes Chapter2 - Chapter 2 Motion in One Dimension...

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9/9/2008 1 1 The kinematics of motion in one dimension Problem-solving strategies Free fall Chapter 2 Motion in One Dimension Topics: 2 Different Descriptions of Motion Motion diagram (student walking to school) Table of data Graph 3 Interpreting Graphs Velocity = slope of position-vs-time graph = rise / run v = D x D t = x f - x i t f - t i 4 Uniform Motion Straight-line motion with equal displacements during any successive equal-time intervals L motion with constant velocity v = D x D t = x f - x i t f - t i ° D x = v D t ° x f = x i + v D t Demo: Motion sensor and Ramp At what point is the object moving fastest, stopped, speeding up, slowing down. etc. 6 Here is a motion diagram of a car moving along a straight stretch of road: Which of the following position-versus-time graphs matches this motion diagram? Position-vs-time graph question A. B. C. D.

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9/9/2008 2 Here is a motion diagram of a car moving along a straight stretch of road: Which of the following velocity-versus-time graphs matches this motion diagram? Checking Understanding A. Slide 2-13 B. C. D. 8 Sue moves according to the plot. What are her instantaneous velocities at t =2, 6, & 10 s? MOTION IN ONE-DIMENSION 9 A student drives along a straight road according to the plot. 1) True or 2) False : At t = 7 s the student is back at the same position she started from? 1. True 2. False Checking Understanding Slide 2-15 A graph of position versus time for a basketball player moving down the court appears like so: Which of the following velocity graphs matches the above position graph? A. B. C. D. A graph of velocity versus time for a hockey puck shot into a goal appears like so: Which of the following position graphs matches the above velocity graph? Checking Understanding A. B. C. D. Slide 2-17 Demo: Motion sensor and person walking Can you match the graph