4lecture2a08

# 4lecture2a08 - Physics 2A Lecture 4 Vivek Sharma UCSD...

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Physics 2A Lecture 4: Jan 14, 2008 Vivek Sharma UCSD Physics

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Announcements • Problem solving sessions for this week only – Section A: Monday, 7pm CSB002 – Section B: Monday, 5pm CNTR109 – Section C: Monday, 6pm WLH2001 – Time conflict? Attend 6pm session in WLH2001 • Reading assignment this week: Ch. 2 Motion along a Straight Line (read ahead!) Home work problem set 2 posted at website Home work problem set 2 posted at website MLK holiday next Monday, so no PB but Quiz on MLK holiday next Monday, so no PB but Quiz on Tue 22 Jan. To help you, TAs will use Friday Tue 22 Jan. To help you, TAs will use Friday s s discussion session to set up many HW discussion session to set up many HW problems problems be sure to attend DI be sure to attend DI
Lectures This Week • Study of Mechanics: Study of relationships among force, matter and motion Kinematics : study of motion of objects Dynamics : relation of motion to its causes • Simplest form of motion: object moving along a straight line. –Describe object’s in motion by a point particle –Measure its displacement in direction x Vs time t, describe motion in terms of Æ its speed, velocity & acceleration

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Today: Motion Along Straight Line Zero to 60 In about 3 seconds
Need to Define A Reference Frame First +x -x +y -y (0,0) Defines for a displacement vector which way is positive and which way is negative

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Displacement Vector
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4lecture2a08 - Physics 2A Lecture 4 Vivek Sharma UCSD...

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