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1、1.质点运动学单元练习（一）答案1．B2．D3．D4．B5．3.0m；5.0m（提示：首先分析质点的运动规律，在t<2.0s时质点沿x轴正方向运动；在t=2.0s时质点的速率为零；，在t>2.0s时质点沿x轴反方向运动；由位移和路程的定义可以求得答案。）6．135m（提示：质点作变加速运动，可由加速度对时间t的两次积分求得质点运动方程。）7．解：（1）（2）8．解：otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorof
2、thenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,Dire
3、ctorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand2质点运动学单元练习二答案—57ωths9．解：（1）设太阳光线对地转动的角速度为ω（2）当旗杆与投影等长时，10．解：-kvdv/dy已知y=yo，v=vo则otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthen
4、ewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,Director
5、ofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand2质点运动学单元练习二答案—572.质点运动学单元练习（二）答案1．D2．A3．B4．C5．；；；6．；；；7．解：（1）由速度和加速度的定义；（2）由切向加速度和法向加速度的定义（3）8．解：火箭竖直向上的速度为火箭达到最高点时垂直方向速度为零，解得otherstaffoftheCentre.Duringthewar,Zhuwas
6、transferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterpri
7、sesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand2质点运动学单元练习二答案—579．解：10．解：；otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingde
8、zhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeenth
