[]
?????é???????à??????????????????
?????????ú?????ú?????????é?????????á???????????¨????
??????????????????????
????×?????×·??????????????????????
????????°?????????????×??????????·??
?????????????ì??????????±??¨·??§??°???
???????????°????????????×???????????????
???¨??????°×??????
?????????÷×?????????????·??????????????ó????
?????????·??17?????????????à?·???à????????30?ò?×??
·???55m/s???ó????101325kpa??????????0???ó????×????????????????????±????
??????????V0=0
??????V??gt
????????h=gt2/2
????±??????ú?????????ó?±????
?????????(????? )?í??
??????????????ê?í?????????????????·?????
?°???????????¨?????????????????????????¨???????????????¨?????±
????????????????·???????????????°??ó?????????????????????±??±????±????
??????????????????????????????????
???§????°×??°???
???????????????????±??????????·???????????
?±??°???????×????????????????·?±?á????????????
?????÷?ó???????ú???ú???????????ò??????
|?? ???)?
??????±???×?????
???????ù×???????????±?????°?±??????è?ù???????ó??×??ú??à?à????????è??°???
?????·×????????????????????·??????×?????????
??????×????·????????????
?é???????????????????????????à??????
?????????·???????ü???????????????±?÷?é????????±??¨??
??-`????-
???????????????????????????°??±????????¨°×??
??????°???????????????·è?????ù?????????·??
??????????·???????±??¨?±???????à?±?????§?ò??TNT?±????
???±??·??????ò?×±????ò?????????·?????÷?¨??????????????????????×?????°?·???????????
?°?????±
???ù???ì????????±§????????±????÷?¨?¨??????????
????±????é??????????????????
??(??||(????(???????)??
×??°??×???????????????
(?)?(?d)?°°??????????????????????±
±??¨?????÷??????????????×ù?????????????ó·???????
?????????????????ó??????????
???§??????à??????????ü?à??????????±?????????????
??????±??????????·????°×????°???
???????????¨??×???°???
?????··???±????÷?¨????±????????ó??????????????×?±??¨??
?°?í?????????ù°????ú????????????????·¨±?°????±
???§×??°???·±????????????????????ù??
???????ó????????
±??¨?à?¨???????é?????à?????§?à???ó?????ì???????????????é??????
???í±?÷???????·?×??ó?ó??????
<?)#)))¨Q
???±??±???????????????????????????????
?????ú????????????????????????±????ó??????????
???????????????ü?????????????????????????????ù????
???í?????é?????é???????????±??±??????¨??°?×?????
??×??????????????ú????????
<?)#)))¨Q
??????????????
????????????°????????ü????????????????°???
????????????????????????????????????????
??×??????????????§????????????·?×ê???????????±?????¨·?°???
?°×????????????±
???????±?±????×??ó????±??¨????????????????
·è?????é?é???ì????????????
??????×???????????×????????¤???°???ó?????????????????????????±
?????????????????°????????±?????°?????±??ì?????????±
??????×???????×????é?é????????±í?é????????°???
??×???±?×??????????????à?????????é?é????
×???????????°??à?????????ú?ú??
???????±????×?±?°??í?°???????é?é?????????±?ò??
???§?ó?????°?????????????????????÷?????????±
????????????×÷???±???????°???¨?????????ó???????í?°??????
?????§?????·?????????§??????
?í×???????????????????·ò???????????????·??
ר?????????????é?é???§??
?????ì??????????????????????????????????
???????????±?ì????
(???????)?°×????????????????????????????¨???????±
??×??áê???×·×??????????í?°??????
???????í?????é??????????????????×??°???????¨??????
???????????????ù±?×·?????????÷??
?ü???????????à???????ò?×????????????×ê??×ó????
×??????????§??
?????????±???????ü???§???·????
×??????ü????°??à?????·??
?????ú????·?????????×·?????????????????ü????????
?????????????????????é?é???????????????ú×?°????????????????????÷?ì??
×??ó???????????????ù°??à?????????é????????????°??à?????·??
?°?????±
???ù?¨?ì????????????×ê??°???????????×ê??????
???ü???????????±?ò?????????????????????×?¤?????ù??
?????????????????ü60?×???í???¤×?????????????
?í?????????????ù?????í???????????¤×??????????????ì????
????????±????ù??×???×????ù??×?????
???????ò?????ó??±????ó????????????
±??×??·???????±??????·?????¤×?????????????????????????
??????×??????±?÷????×???
??(????)??????
????????(??
?|||)???????è??
?°???????????÷???ó????±???????????????????????????±??¤?¤???????±
?°??????????±???°????±
?ó±???°??????????????????¤???????????????÷??°???
????????????±?????????????????×??????????????????ú?????????í???¤?í????
???????????ú???°?????????????????ó???ú???í???ù???±
???§????·?°×???°???ì±????ü?????í?????ü?????????????????????????÷??????????????????????°????±
?í???????????????ú?????????????í?????ó?ò????
×???????????????????×????é?é???????ó?????????????ó±????????ì??
???????×?ó??????????????????×??????±????
???????ó????????????????°??à????????????
????°?????????????????
?¤???ó?????????????????ù????
?°?????????é?é???????????????????????±
???????????ù???????á???????í???????·???°?????÷?????í???ó????
?????????ü?????ú???à???·??????×ê????????????
????????????
·????????????????§?×???????í??????????????????????
?ó??°?×???±??÷?§????????????
?????í???????????????????í?°??
??????????×???????°ò±??í??????????????
????????????????±????????§??
????????????
?°???????ü????±ê?????????±
??????????????????
???í????????????????????????±?????
×ó?à???????·???°???ó???????????????í???????±?±??±???·????????ò?±?ì????????
?????í???????·????×???????????
?????????°?à??????????·???????·??????????°·í?í??????
???·???±???ò????×???????????
????·è??????????
?°·????×???????????????????°?ù??×????±
????×??í???????÷???????±?ò???????????????±??????ê???×??í?????????ü??????????
?????????±???í??????????????????????????
?????±?????????°?????¨??×????????????????í??????×???????????
???í?°??????·??ù????????????
×???????????????ê??????????°??????????×????????????ü??????????????????
?°?é???±
???????????±??±??ü?é???????????±±??ü·????????????????????????ò???????°?ù??×???????·??ù??
??±??÷??????±?·????×????·???????????????????????????
????????????
×?????????????±?????
???·???????í??????????????????????±???????????
??????????????????
????????????·ò??×????ú?í??????????±??÷????