AP物理C力学模拟卷Multiple Choice Questions.doc

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1、MultipleChoiceQuestionsTime:45minutes.YoumayrefertotheConstantssheet.However,youmaynotusetheEquationssheet,andyoumaynotuseacalculatoronthisportionoftheexam.1.Acannonismountedonatruckthatmovesforwardataspeedof5m/s.Theoperatorwantstolaunchaballfromacannonsotheballgoesasfaraspos

2、siblebeforehittingthelevelsurface.Themuzzlevelocityofthecannonis50m/s.Whatanglefromthehorizontalshouldtheoperatorpointthecannon?A.5°B.41°C.45°D.49°E.85°2.Acarmovingwithspeedvreachesthefootofaninclineofangleθ.Thecarcoastsuptheinclinewithoutusingtheengine.Neglectingfrictionanda

3、irresistance,whichofthefollowingiscorrectaboutthemagnitudeofthecar'shorizontalaccelerationaxandverticalaccelerationay?A.ax=0;ayg3.Abicycleslowsdownwithanaccelerationwhosemagnitudeincreaseslinearlywithtime.Whichofthefollowingvelocit

4、y–timegraphscouldrepresentthemotionofthebicycle?1.Acartisslidingdownalowfrictionincline.Adeviceonthecartlaunchesaball,forcingtheballperpendiculartotheincline,asshownabove.Airresistanceisnegligible.Wherewilltheballlandrelativetothecart,andwhy?A.Theballwilllandinfrontofthecart,

5、becausetheball'saccelerationcomponentparalleltotheplaneisgreaterthanthecart'saccelerationcomponentparalleltotheplane.B.Theballwilllandinfrontofthecart,becausetheballhasagreatermagnitudeofaccelerationthanthecart.C.Theballwilllandinthecart,becauseboththeballandthecarthavethesam

6、ecomponentofaccelerationparalleltotheplane.D.Theballwilllandinthecart,becauseboththeballandthecarthavethesamemagnitudeofacceleration.E.Theballwilllandbehindthecart,becausetheballslowsdowninthehorizontaldirectionafteritleavesthecart.2.Thequantity"jerk,"j,isdefinedasthetimederi

7、vativeofanobject'sacceleration,Whatisthephysicalmeaningoftheareaunderagraphofjerkvs.time?A.Thearearepresentstheobject'sacceleration.B.Thearearepresentstheobject'schangeinacceleration.C.Thearearepresentstheobject'schangeinvelocity.D.Thearearepresentstheobject'svelocity.E.Thear

8、earepresentstheobject'schangeinposition.3.Aparticlemovesalongthex-ax