Exam 2 Review

Jerika McKeon

You will need your CID for the exam- Memorize it!!!!!

Exam 2 ReviewAnnouncementsOther Reviews:Tomorrow @ 5:30-7pmFriday @1-3pm (weekly) 108 MARBCheck to see if you are missing any FBD scores. If you are, check the boxes to see if you put the wrong CID.Turn it back into the 105 Appeals box.Im behind on extra credit, but I will grade it. Dont worry about sending me an other copy. I will email you once your extra credit is in Max.EnergyKinetic EnergyPotential EnergyGravitational PESpring PEWorkW=change in energyW=F//dWork lost by frictionPower (NOT IN SYLLABUS)P=E/t

Conservation of EnergyWork-Energy TheoremCollisionsElasticInelasticPerfectly Inelastic

Energy Cont.Kinetic EnergyPotential EnergyLinear KEKE=1/2*m*v^2Rotational KE1/2*I*^2Depends on moment of Inertia (well talk about that in a minute)

Gravitational PEPE=mgyPE=-GMm/rPE=0 at r=Escape velocity equationsSpring PEF=-kxPE=1/2*k*x^2Always positive (for both compressed & stretched springs)Linear Momentump=mvConservation of momentum- When is this true?Impulse=FtFt=p

CollisionsElasticInelasticEnergy is conservedConservation of momentum and conservation of energyCan use the velocity reversal equationUsually you will use 2 equations and make some substitutions to get your answerInelasticEnergy is not conservedUse conservation of momentumPerfectly InelasticEnergy is not conserved; Max energy is lostObjects stick togetherUse conservation of momentumConservation of EnergyEi+Wnet=EfWnetEnergy lost from frictionEnergy gained through other forcesPhotogate problem!Angular StuffAngular Kinematics=f i=/t=/tOther kinematics equationsConversions- all must be in radianss=rv=ra=rMoment of InertiaAnalogous to massDepends on how the mass of an object is distributedI=mr^2 for point massI=other stuff for other shapesAngular Momentum & KEAngular momentumLi=LfL=IL=rp (hidden angular momentum)KE=1/2*I*^2

TorquePivot PointsT=rFTnet=ISum of Torques just like sum of ForcesCounterclockwise = positiveClockwise = negativeEquilibrium = no angular or linear accelerationTnet=0Fnet=0