12.07.2015 Views

AP Physics B - Freehold Regional High School District

AP Physics B - Freehold Regional High School District

AP Physics B - Freehold Regional High School District

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What is agravitational fieldand what are thefactors that affectthe field strength?Why do weconsideracceleration dueto thegravitational pullof the Earth to beconstant when inactuality it is not?Differentiate betweengravitational force, theresulting acceleration of anobject, and the mechanismthat causes the attraction,the fieldUse Einstein's analogy ofthe alteration of spacetimeto explain how twoobjects can interactwithout touching eachotherCalculate the gravitationalfield strength at differentpoints/locations aroundthe Earth and on otherPlanetsIdentify when accelerationdue to gravity can beconsidered constant andwhen it is notRecognize thatgravitational force can bethe cause for an object'scircular pathStretch fabric in frame (to hold taut), spheres ofdifferent masses (like marbles, ball bearings, golf ball,ping pong ball, etc.)Elegant Universe video hour 1 part 2 & 3What's the Matter with Gravity videoPhET simulation‐ FieldsTextbook or supplemental materialInteractive white boardCalculatorsData mass and radius of different planets as well asEarthUse stretchy cloth and differentmass objects sitting on the fabricto demonstrate the warping ofspace‐timeUsing weight, Newton's 2nd lawand ULOG, solve for gravitationalstrength at different locationsWatch videos of explanations offields and effects caused by fieldswith visualizationsClass discussionCalculate gravitational fieldstrength vector for differentscenarios and locationsDerive expression to solve for theacceleration due to thegravitational pull of an objectusing ULOG and compare to thegravitational field strength at thesame locationCalculate the acceleration of anobject at different locations abovethe Earth's surface usinggravitational field strength andULOGClosure & reflectionsQuiz‐ Calculating thegravitational field strengthPractice problemsHomework & practiceProblem solvingQuiz‐ Acceleration of anobject due to gravitationalforce.What are Kepler'sthree planetarylaws and who willthey be used(includingassumptions) topredict planetarymotion?Apply Universal Law ofGravitation and Circularmotion to determineKepler's 3rd LawApproximate planetarymotion to circular motionaround the SunPrefabricated data (or actual data) of planetary orbitsCalculatorsGraphing programs/paperTextbook or supplemental materialTeacher Lecture (history ofKepler's laws and the trouble withobtaining Tycho's data)Plot data on graph and add trendline. Find slope to get relationshipbetween radius of orbit andperiod of orbit. Check withderivation using circular motionand ULOG math expressionsClass discussion of findingsPredict and test for Earth andmoonClosure‐ What assumptionsdo we make when usingKepler's Laws?Quiz‐ Kepler's 3rd LawHomework & practice

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