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AP物理1测试卷试题及答案1.Abowlingpinisthrownverticallyupwardsuchthatitrotatesasitmovesthroughtheair,asshowninthefigure.Initially,thecenterofmassofthebowlingpinismovingupwardwithaspeedviof10?m/s.Themaximumheightofthecenterofmassofthebowlingpinismostnearly(A)vi2/2g(正确答案)(B)2g/vi2(C)Theanswercannotbedeterminedbecauseanirregularlyshapedobjectistoocomplextotreatasasinglepointmass.(D)Theanswercannotbedeterminedwithoutknowinghowlongittakesthebowlingpintoreachitsmaximumheight.2.Ahollowplasticballisprojectedintotheair.Thereissignificantairresistanceopposingtheball’smotion,sothemagnitudeoftheball’saccelerationisnotequaltog.Attimet,theballismovingupandtotherightatanangleof45°tothehorizontal,asshownabove.Whichofthefollowingbestshowsthemagnitudeaandthedirectionoftheball’saccelerationattimet?(A)(B)(C)(正确答案)(D)3.T