Chapter 2 One dimensional Kinematics 1 Position distance and displacement the particle travels from X1 to X2 0 Xf X2 1m t2 2s Xi X1 3m t1 1s x Position X1 X2 Travel distance d 2m always 0 Displacement X X2 X1 1m 3m 2m can take any values 2 Average speed and velocity Average speed Speed Average velocity v AV d d 2m 1s 2m s t 2 t1 t X 2 X 1 X 2m 1s 2m s t 2 t1 t Graphical interpretation of average velocity the slop of a line in the x t graph is the average velocity of during that time 3 Instantaneous speed and velocity when t t2 t1 0s The slop of a tangent line at any point in the x t graph is the instantaneous velocity at that time The magnitude of the instantaneous velocity is equal to the instantaneous speed This is measured by a speedometer Create PDF files without this message by purchasing novaPDF printer http www novapdf com Create PDF files without this message by purchasing novaPDF printer http www novapdf com Create PDF files without this message by purchasing novaPDF printer http www novapdf com Welcome to PHYS 1111 class INTRODUCTORY PHYSICS The first homework has been posted on Wednesday Jan 07 and its due date is at 11pm Jan 17 2014 OFFICE HOURS from 9 30am to noon on Tuesday and Thursday Everyone is expected to have a clicker on Monday Jan 12 If you can not register the clicker on elc you can give it to me today after the class MAKE SURE THAT YOUR DEVICE WORKS I will often post announcement and homework solution on the ELC website Please check it daily Make sure that you have done with the QUESTIONAIRE If you have troubles with the elc or LON CAPA system let me know For 3 35pm class Kwak Yi Im Haerin have the same clicker ID B1903B Create PDF files without this message by purchasing novaPDF printer http www novapdf com Chapter 2 One dimensional Kinematics 1 Position distance and displacement the particle travels from X1 to X2 0 X Xf 1m tf 2s X0 Xi 3m ti 1s x Position Xi Xf Travel distance d 2m always 0 Displacement X Xf Xi 1m 3m 2m can take any values 2 Average speed and velocity Average speed Speed Average velocity v AV d d 2m 1s 2m s t f ti t X f Xi t f ti X 2m 1s 2m s t 3 Acceleration a AV V f Vi t f ti V t For motion with constant acceleration with vf v and vi v0 Choose t0 0 1 x x0 v0t at 2 2 v v0 at v 2 v0 2a x x0 2 1 2 Tangent line in v t graph is acceleration 3 Create PDF files without this message by purchasing novaPDF printer http www novapdf com 1 x x0 v0t at 2 2 v v0 at v 2 v0 2a x x0 2 1 2 3 Create PDF files without this message by purchasing novaPDF printer http www novapdf com Free falling acceleration Which objects reach the floor first If inside the cylinder is 1 air a leather b washer c the same 2 vacuum a leather b washer c the same Create PDF files without this message by purchasing novaPDF printer http www novapdf com 1 x x0 v0t at 2 2 v v0 at v 2 v0 2a x x0 2 1 2 3 Create PDF files without this message by purchasing novaPDF printer http www novapdf com Welcome to PHYS 1111 class INTRODUCTORY PHYSICS The first homework has been posted on Wednesday Jan 07 and its due date is at 11pm Jan 17 2014 OFFICE HOURS from 9 30am to noon on Tuesday and Thursday Everyone must have a clicker on Monday Jan 12 If you can not register the clicker on elc you can give it to me today after the class MAKE SURE THAT YOUR DEVICE WORKS I will often post announcement and homework solution on the ELC website Please check it daily If you have troubles with the elc or LON CAPA system it is your responsibility to inform me for solving the problem For 2 30pm class Aaron Moon has the same device ID as Charles Moon Create PDF files without this message by purchasing novaPDF printer http www novapdf com Chapter 2 One dimensional Kinematics 1 Position distance and displacement the particle travels from X1 to X2 0 X Xf 1m tf 2s X0 Xi 3m ti 1s x Position Xi Xf Travel distance d 2m always 0 Displacement VECTOR X Xf Xi 1m 3m 2m can take any values 2 Average speed and velocity VECTOR Average speed Speed Average velocity v AV d d 2m 1s 2m s t f ti t X f Xi t f ti X 2m 1s 2m s t 3 Acceleration VECTOR a AV V f Vi t f ti V t For motion with constant acceleration with vf v and vi v0 Choose t0 0 1 x x0 v0t at 2 2 v v0 at v 2 v0 2a x x0 2 1 2 Tangent line in v t graph is acceleration 3 Freely falling acceleration a g 9 81 m s2 Create PDF files without this message by purchasing novaPDF printer http www novapdf com 1 x x0 v0t at 2 2 v v0 at v 2 v0 2a x x0 2 1 2 3 Create PDF files without this message by purchasing novaPDF printer http www novapdf com Chapter 3 Vectors in Physics 1 Vector position and displacement the particle travels from xi to xf 0 xf 1m tf 2s x rf xi 3m ti 1s x ri Vector displacement r Position xi xf are components of i and Vector unit x has magnitude 1 and follows positive direction r r f ri x f x xi x 1m x 3m x 2m x Vector average velocity and acceleration r f ri r v AV 2m 1s x t f t i t v f vi v a AV t f ti t rf 2m s x Relations between components of vector in x axis If a is a constant 1 x x0 v0t at 2 2 v v0 at 1 2 2 v 2 v0 2a x x0 2 addition subtraction of two vectors A Ax x Ay y B Bx x B y y C A B Ax Bx x Ay B y y C x x C y y Create PDF files without this message by purchasing novaPDF printer http www novapdf com A Ay y x Ax 3 Ax A cos Ay A sin Ay tan Ax 2 A Ax Ay 2 Create PDF files without this message by purchasing novaPDF printer http www novapdf com Create PDF files without this message by purchasing novaPDF printer http www novapdf com
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