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lecture3_09

# lecture3_09 - Homework"intro to webassign due tomorrow at...

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1 Phy 2053 Announcements Homework (“intro to webassign”) due tomorrow at 11:59pm is practice and not for credit. You can access homeworks without having a registration code (until Jan 17th). Homework 1 due Jan 21 is posted in webassign. It will count towards course grade. Solution manual: We are working with UF bookstore to order them for you to purchase. Yellow book (past exams and solutions) available at Target Copy for \$16 Clicker questions will count towards course grade starting Jan 27. 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 = v v 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 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.

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