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Course: PHY 303, Fall 2011School: RIT
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313 PHY Fall 2010 Dr. Viv QUIZ#02 Name: <extra credit 1> <extra question credit question 2>
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313 PHY Fall 2010
Dr. Viv
QUIZ#02
Name:
<extra credit 1>
<extra question credit question 2>
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RIT - PHY - 303
RIT - PHY - 303
PHY 313 FA 10Dr. VivQUIZ # 03Name:----<extra credit question #1><extra credit question #2>
RIT - PHY - 303
RIT - PHY - 303
PHY 313 FA 2010Dr. VivQUIZ #4Name:----<extra credit question #1>-<extra credit question #2>-
RIT - PHY - 303
RIT - PHY - 303
RIT - PHY - 303
RIT - PHY - 303
RIT - PHY - 303
RIT - PHY - 303
RIT - PHY - 303
Kettering - MECH - 115
00 introductionmy expectationsyour expectationsgradingon-line quizzeswhat I expect from you: active learningbefore classread chapter before we beginwarm-up quiz (on-line) on reading*during classthink/pair/share quizzes*be prepared with question
Kettering - MECH - 115
01 Motiondiagramsuse movie to studymotionfixed time betweenframesdon't pan the camera!usually 1/30th of a secstrobe pictures arefasterfaster objectshave greater positionchange between framesWhich car is going faster, A or B? Assume there are
Kettering - MECH - 115
02 Velocity &accelerationrv(average) velocity: tvector displacement rtime interval tdraw the velocity vector vvthe same size as the displacement vectordon't forget the difference in meaning, unitsvelocity:how fast it's goingAND in what dir
Kettering - MECH - 115
03 Motion in1 dimensioncoordinate systemoriginpositive direction: conventionx: right y: upposition-time graphsposition on vertical axis(dependent variable)even if position ishorizontaltime on horizontal axis(independent variable)can pick off
Kettering - MECH - 115
04 position, velocity and accelerationif v is constant s=v s tdisplacementchange in positionarea under v(t)workbook:2.2b page 2-3displacement when v isn't constanttfs f = si v s t dttiintegral = areaunder curvebetween curve andaxisintegrat
Kettering - MECH - 115
05 problem solving: constant amodel: particle modelvisualize: shift between these as neededmotion diagrampictorial representation: labelv fs = v is a s tsolve12s f = si v is t a s t 2assess22v fs = v is 2 a s s units? sensible? believable?
Kettering - MECH - 115
06 Instantaneousaccelerationa s=d vsdt v s = a s dtfollow up:workbook 2.28page 2-16Rank in order, from largest to smallest,the accelerations aA aC at points A C.A) aA > aB > aCB) aC > aA > aBC) aC > aB > aAD) aB > aA > aCWhich velocity-vers
Kettering - MECH - 115
07 Vectors and componentsvector: magnitude & directionscalar: magnitude onlyreview:follow up:Workbook 3.1-3Page 3-1Which figure showsA1 A 2 ?A1 A 2 A 3 ?multiplying a vector by a scalar. by a positive scalar. by a negative scalarfollow up: 3.
Kettering - MECH - 115
08 Identifying forcesA force is. a push or a pullI push/pull on your handdo I exert a force? do you?does it matter if our hands move?I push/pull on a doorknobdo I exert a force? does the door?does it matter if the door moves?does a spring exert a
Kettering - MECH - 115
stnd09 Newton's 1 and 2 lawsIssues:Is a force needed to produce uniform motion?What happens to motion if a constant force is applied?DemonstrationndNewton's 2 lawFnet1a= Fi=mmiobservations from experiment:more mass lesser accelerationmo
Kettering - MECH - 115
10 Applying Newton's LawsThe basic equations areNewton's 1st law0F = F i =netior Newton's 2nd lawF = F i = m anetiEquation hunting won't solve these problemsNeeded: Problem solving strategyapply the same patternvary the approach to match th
Kettering - MECH - 115
11 Mass and weightmass:a F i=m iweight: force of gravityw=m gsame mass m in both formulasdirection: downwardscoincidence? General Relativity?apparent weight: normal force of scale on feettry bouncing on a scale!Inclined plane#1#2#3#1: (A)
Kettering - MECH - 115
12 frictioncontact forces at an interface between surfacesnormal force acts perpendicular to interfacefriction force acts parallel to interfacefriction equationsMODEL observed behaviorfriction caused bysurface bondingtypes of frictionstatic: no m
Kettering - MECH - 115
13motion in 2drva , , are vectors, with componentstrajectory (path) graph: y(x)rv avg =trecall: vector subtraction infollow up: workbook 6.2 (page 6-1)instantaneousvelocity &accelerationdrv=dtdva=dtv is tangent to trajectorycompo
Kettering - MECH - 115
14 projectile motionno horizontal acceleration: constant horizontal velocitydemo: knock 2 balls off a table (different v)mga==g=mmacceleration is vertically downwardsF netlisten for the impacts. does one hit first?follow ups:workbook probl
Kettering - MECH - 115
15 UniformCircular Motionangular position qpositive =counterclockwise (ccw)from +x axisalways measured in radians2p rad = 1 rev = 360arc length s = r which looks bigger?a dime at arm's length s 2 cm, r 0.8 mthe moon s = 3.5 x 106 m, r = 3.8 x 1
Kettering - MECH - 115
n16 Circular dynamicsTdemo: object moves on string in horizontal circle wnet force is towards center, constantthis produces constant acceleration towards centerthis results in uniform circular motiontension can also create linear acceleration!circ
Kettering - MECH - 115
17 Non-uniform circular motiondemo: loop-the-loopat the bottom: FBDnormal force is upweight is downnet force is towards centernwat the top: FBDnormal force is downnet force is towards centernweight is downwvcritical issues2mat the bottom
Kettering - MECH - 115
18 Newton'srd3 lawobjects exert forces on each otherroles of object/agent switchinteraction pairs never act on the same object!problems now have several systemsforces includeexternal forcesinteraction forcesdifferent FBDs: draw dotted line to co
Kettering - MECH - 115
19 Ropes & Pulleystension holds a rope togetherend of rope exerts this force onobject it's touchingacceleration constraint:cutting the rope severs bonds,removes forces: ends fly apartmagnitude of accelerations ofanything tied to the same rope ist
Kettering - MECH - 115
20 Momentum and ImpulseConservation laws common: e.g. mass:pour 100 g of vinegar into 100 g of oil.what's the mass of the vinaigrette?Many other physical quantities often conservedmomentumangular momentumenergychargemomentumpv m vector: direc
Kettering - MECH - 115
21 Conservationof Momentum#1 = mosquito#2 = truckduring the collision, whichhas the greater magnitude.force?acceleration?impulse?change in momentum?change in velocity?(A) 1(B) 2(C) samesuppose:collision lasts tm1 < m2|(vix)1| = |(vix)2|c
Kettering - MECH - 115
22 Kinetic and Potential EnergyTwo types of energy (many variants)Kinetic (involves motion)translational kinetic energyfollow up: WB 10.6,7 page 10-2potential energy (involves position)gravitational potential energy12K= mv2U g=m g yfollow up:
Kettering - MECH - 115
23 SpringsHooke's (force) law: F sp s =k s = k s s e each end exerts this force!spring constant kstiffness: demoForce : stretch ratiomass mForce : acceleration ratiofollow up:WB 10.15 (p. 10-5)Spring FBDsdraw a FBD for the object on each endA
Kettering - MECH - 115
24 elastic collisionsall collisions conserve pm1 v fx 1 m 2 v fx 2 = m1 v ix 1perfectly elastic collisions also conserve K111222m1 v fx 1 m 2 v fx 2 = m1 v ix 1222tedious algebra (p 287-8) yields v fx 1 = v fx 2=m1 m 2m1 m 22 m1m1 m 2
Kettering - MECH - 115
25 WorksfW = F s dssiWork force * distancenot generallyOnly the component of theforce in the direction of thedisplacement does workIF the force is constantW = F s cos Only if also q = 0 willW =F sW and DK: demoswork is an energy transfercar
Kettering - MECH - 115
26 variableforcesW = F s dssiWork force * distancesfnot generallyIF the force and the displacementare parallelsfW = F s dssiOnly if the force is also constantwillW =F sA 1 kg particle starts at x = 0 mwith vx = + 2 m/s.Which is true?(A)
Kettering - MECH - 115
27 Conservation of EnergyK f U f E th = K i U i W extscenarios:what's the system?(A) + (B) - (C) 0push a block across atable at constant speedDK=?DU=?a block slides to a haltWdiss = ?pick up a block, andplace it on a ledgeWext = ?toss a bloc
Kettering - MECH - 115
28 Rotationalkinematicsangular velocityddt = dtsign conventionCCW = +CW = -linear velocitydsvtdt s = v t dtrelationshipv t = r28 Rotationalkinematicsangular accelerationddt = dtsign conventionif a, w havesame sign: speeding upoppo
Kettering - MECH - 115
29 Torque, Rotational Dynamicstorque: rotational analog of forcesign convention: CCW = +, CW = - =r F sin follow up:WB 13.8,9 (p13-3)two complementary viewstangential forcemoment arm =d F =r F tfollow up: WB 13.11 (p13-4)follow up: WB 13.10 (p
Kettering - MECH - 115
30 Rotational kinetic energyAnother variety of kinetic energyFollow up:WB 13.28 p 13-11WB 13.29 p 13-111K rot = I 22Ex:RMwhich is moving fastestSame M, m, R, hhwhen the block hits?mmodelDisc, wheel are rigid bodiesBlock is a particleStr
Kettering - MECH - 212
Kettering - MECH - 212
Kettering UniversityMECH-212 StaticsSpring, 2007Instructor: Richard E. Stanley, Ph.D.Text:Engineering Mechanics: Dynamics, R.C. Hibbler, 10th EditionOffice:2-227 Mott BuildingPhone:(810) 599-4680 CELLE-Mail:rstanley@kettering.edu or via blackbo
Vellore Institute of Technology - MARKETING - 101
Telecom IndustryAIRTELPresentedBy:AnkitaShuklaAnkitaSrivastavaDevendraSinghGirdhariLalPrajapatiSmitaSinhaMissionWe will meet the mobile communication needs of ourcustomers through :Error-free service delivery.Innovative products and services.
Missouri State - ACCT - 40970
Chapter 13 Accounting and Reporting of Current andContingent LiabilitiesBrief Exercise13-1:July 1: Purchase60000Account PayableFreight in600001200Cash1200July 3: Account Payable6000Purchase return6000July 10: Account Payable54000Purchase
University of Phoenix - MATH 209 - 209
Health & WellnessMath 209Learning Team AAnn Williams, Cerita Chappell, MargaretSanders,Sarah O'Neill & Sondra Johnston,Professor: Karen Thorsett-HillW h at i ssu st ai n ab i l i t y ?Sustainability is the capacity toendure. For humans, sustainab
Amity University - ECONOMICS - 121
Planning and Budgeting: Practice Quiz 1344. The Sledge Hammer Company manufactures a line of high quality tools. The company sold 1,000,000 hammersat a price of $4 per unit last year. The company estimates that this volume represents a 20% share of the
Kaplan University - AC 430 - AC 430-01
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Kaplan University - AC 430 - AC 430-01
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Kaplan University - AC 430 - AC 430-01
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Kaplan University - AC 430 - AC 430-01
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Kaplan University - BU 204 - 204
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