Lect06 - Lecture 5 Introduction to Physics PHY101 Chapter 2...

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Physics 101: Lecture 6, Pg 1 Lecture 5 Lecture 5 : Introduction to Physics : Introduction to Physics PHY101 PHY101 Chapter 2: Equations of Kinematics for Constant Acceleration in 1 Dim. (2.4, 2.5, 2.7) Free Fall (2.6) Chapter 3: Equations of Kinematics for Constant Acceleration in 2 Dim. (3.1, 3.2)
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Physics 101: Lecture 6, Pg 2 Summary of concepts from last lecture Summary of concepts from last lecture position: your coordinates (just “x” in 1-D) displacement: x = change of position velocity: rate of change of position average : x/ t instantaneous: slope of x vs. t : lim t->0 x/ t acceleration: rate of change of velocity average: v/ t instantaneous: slope of v vs. t : lim t->0 v/ t
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Physics 101: Lecture 6, Pg 3 Concept Question Concept Question A car is moving along the negative x direction. During part of the trip, the speed increases from 16 to 28 m/s in 1.5 s. Which of the following is correct? 1) v>0, a>0 2) v>0, a<0 3) v<0, a>0 4) v<0, a<0 During another part of the trip, the speed decreases from 48 to 26 m/s in 11 s. Which of the following is correct? 1) v>0, a>0 2) v>0, a<0 3) v<0, a>0 4) v<0, a<0 If speed is increasing , v and a are in same direction. If speed is decreasing , v and a are in opposite direction. correct v a +x correct v a +x
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Physics 101: Lecture 6, Pg 4 Which of the following statements is most nearly correct? 1 - A car travels around a circular track with constant velocity. 2 - A car travels around a circular track with constant speed.
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Lect06 - Lecture 5 Introduction to Physics PHY101 Chapter 2...

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