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lecture3_post

# lecture3_post - Phy 2053 Announcements Homework 0(intro to...

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Phy 2053 Announcements Homework 0 (“intro to webassign”) due tomorrow at 2am is practice and not for credit. You can do it without having a registration code ( until Jan 18th ). Homework 1 due Jan 20 is posted in webassign. It will count towards course grade. SPS (past exams and solutions) will be available at Target Copy for \$20 probably by next week Clicker questions will count towards course grade starting Jan .

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Average vs. Instantaneous Velocity V AB = X AB / t AB = (X f -X i )/ t = (54 m - 30 m)/10s = 2.2 ms -1 t x Average velocity between A and B t x v average
Instantaneous Velocity: keep making smaller: t t x The slope of the line tangent to the position-vs.- time graph is defined to be the instantaneous velocity at that time

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2.19 Runner A is initially 4.0 mi west of a flagpole and is running with a constant velocity of 6.0 mi/h due east. Runner B is initially 3.0 mi east of the flagpole and is running with a constant velocity of 5.0 mi/h due west. How far are the runners from the flagpole when they meet?
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