Non PHYS 2010
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Popular in Physics (Mtsu And Rodp)
This 6 page Class Notes was uploaded by Gilda Wisozk on Wednesday September 23, 2015. The Class Notes belongs to PHYS 2010 at Middle Tennessee State University taught by Staff in Fall. Since its upload, it has received 11 views. For similar materials see /class/213135/phys-2010-middle-tennessee-state-university in Physics (Mtsu And Rodp) at Middle Tennessee State University.
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Date Created: 09/23/15
DISCUSSION CLASS EXAMPLES L2L3 KNOW 1ft12in 1in254cm 1yd3ft APPROXIMATlONS You do not need precise conversion factors when doing approximations 1miz2km 1m1yd3ft 1thumbwidthz20mz1in These are only for when you only want the rough value of something Example 1 About how many drops of water would it take to fill up a glass of water Answer about 2000 drops YOU MUST KNOW THE FOLLOWING DEFINITIONS D tot Average speed Vave ttot where ttOt is the time for the object to travel the total distance Dtot t At Average xcomponent of velocitv V x ave tot must define the x 0 position and the positivex direction Note If the speed v is constant then vave v so v Dt if the speed is not constant then Dt gives only the average speed vave not necessarily the Speed at any instant Example 2 You find yourself standing in the center of a very long straight hallway You walk straight fonNard for 43 min 258 3 during which time you walk a total distance of 103 m Call this direction of motion the positivex direction You then stop and talk to someone for 6 minutes and 20 seconds 380 s after which you realize that you are late for a meeting and run back down the hall opposite to the direction you originally walked at 23 ms for 30 min 180 s at which point you arrive at your meeting place a What was the total time in seconds that you spent wandering the hall from when you originally started walking to when you arrived at the meeting place Answer 818 s b What total distance did you walk Answer 517 m c What were your speeds during each part of your journey Answers 040 ms 0 23 ms d What was your average speed during the total time in part a Answer 063 ms e What was your average xcomponent of velocity during the total time in part a Answer 038 ms f Which of the following position vs time graphs best describes your motion described above 1 2 3 Position vs Time and Velocity vs Time Graphs X Xn goes faster and faster acceleration starts from rest ConcepTest Example 3 Describe the motion dictated by each of the graphs below Xn V