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ò??￠?ˉá?
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B￡???ì?μ??ˉá???′ó￡????ù?è??′ó
C￡???ì?μ??ˉá???′ó￡????ˉ?ü??′ó
D￡???ì?μ??ˉá?·￠éú±??ˉ￡????ˉ?ü?é?ü2?±?


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A￡???ì?×??è?ù?±?????ˉ
B￡???ì??ˉá?±??ˉá??aá?
C￡???ì?μ?3????ˉá?′óD??àμè
D￡???ì?μ?3????ˉá??é?ü2?í?



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1￡?1?óú?ˉá?μ?????￡???áD?μ·¨?yè·μ?ê?(????)
A￡??ˉá?′óμ???ì?1?D?ò??¨′ó
B￡??ˉá?′óμ???ì????ˉò??¨?ì
C￡??ˉá??àí?μ???ì????ˉ·??òò??¨?àí?
D￡??ˉá??àí?μ???ì??ù?èD?μ?1?D?′ó

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B￡??êá?D?μ???ì??ˉá?2?ò??¨D?
C￡??ù?è′óμ???ì??ˉá?ò??¨′ó
D￡??ù?è′óμ???ì??ˉá?2?ò??¨′ó

3￡?1?óú?ˉá?±??ˉá?μ?·??ò￡???áD?μ·¨?D?yè·μ?ê?(????)
A￡?ó??ù?è·??ò?àí?
B￡?ó??ù?è±??ˉμ?·??ò?àí?
C￡?ó???ì?êüá|·??ò?àí?
D￡?ó???ì?êüμ?μ?×@@?á?μ?·??ò?àí?

4￡???óúè?o?ò????êá?2?±?μ???ì?￡???áD?μ·¨?yè·μ?ê?(????)
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5￡???óúá|μ?3?á?μ??μ·¨￡??yè·μ?ê?(????)
A￡?á|??′ó￡?á|μ?3?á??í??′ó
B￡?×÷ó??ú??ì?é?μ?á|′ó￡?á|μ?3?á?ò22?ò??¨′ó
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D￡??2??óúμ???μ???ì?êüμ?????í?á|Fμ?×÷ó?￡??-ê±??t??ì?è??2?1￡??ò′?í?á|μ?3?á??aá?

6￡?′óí?ò????è????μ?2￡᧱-μ??ú???àμ?é?±èμ??ú?àíáé?ò×?é￡?ê?òò?aμ??ú???àμ?é?ê±￡?±-×ó(????)
A￡?êüμ?μ?3?á?′ó????????
B￡?êüμ?μ?×÷ó?á|′ó
C￡??ˉá?μ?±??ˉá?′ó
D￡??ˉá?′ó

7￡???3μ′ó?2?1?aê??????±1ìμà×??è?ó?ù???ˉ￡??ùêüμ?×èá|ê???2?±?￡??ú′?1y3ì?D￡???áD?μ·¨?yè·μ?ê?(????)
A￡???3μê?3?1|?ê?e?￥??′ó
B￡???3μê?3?1|?ê2?±?
C￡??úè?òaá??àμèμ?ê±???ú￡???3μ?ˉ?ü±??ˉ?àμè
D￡??úè?òaá??àμèμ?ê±???ú￡???3μ?ˉá?±??ˉμ?′óD??àμè

8￡?ò????êá?ê?0.1 kgμ????ò￡?ò?6 m/sμ??ù?è?????òóò???ˉ￡???μ?ò????áó2μ???°-??oó±?μˉ??￡???×?í?ò??±??ò?6 m/sμ??ù?è?????ò×ó???ˉ?￡
?ó￡o??×2?°oó???òμ??ˉá?óD??óD±??ˉ￡?±??ˉá??àéù￡?








9?￠ò??êá??a0.5kgμ????éò?10m/s?ù?è???????a300μ?1a??D±???òé????ˉ￡¨éèD±??×?1?3¤￡?, ?ó???é?ú1s??μ??ˉá? oí3s?úμ??ˉá?±??ˉá?μ?′óD?￡?￡¨g=10m/s2￡?












àyìa′e°?￡o
1. ??′e°???p1￡?0.8 kg•m/s￡?·??ò?ò????p2￡?0.6 kg•m/s￡?·??ò?òé???|¤p￡?1.4 kg•m/s￡?·??ò?òé?
???a????ò??ò??μ?·??ò?a?y￡??òóémgH￡?12mv2μ?
ó?μ????ó′￥ê±μ??ù?èv1￡?2gH￡?4 m/s
′?ê±μ??ˉá?′óD?p1￡?mv1￡?0.8 kg•m..