当人造地球卫星绕地球做匀速圆周运动时,下列说法正确是 A.在同一轨道上,卫星质量越大,运动速度越
\u5173\u4e8e\u7ed5\u5730\u7403\u505a\u5300\u901f\u5706\u5468\u8fd0\u52a8\u7684\u4eba\u9020\u5730\u7403\u536b\u661f\uff0c\u4e0b\u5217\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff08\u3000\u3000\uff09 A\uff0e\u8f68\u9053\u534a\u5f84\u8d8a\u5927\uff0c\u901f\u5ea6\u8d8a\u5927 B\u4eba\u9020\u5730\u7403\u536b\u661f\u7ed5\u5730\u7403\u505a\u5300\u901f\u5706\u5468\u8fd0\u52a8\uff0c\u7531\u5730\u7403\u7684\u4e07\u6709\u5f15\u529b\u63d0\u4f9b\u5411\u5fc3\u529b\uff0c\u5219\u6709 G Mm r 2 =m v 2 r \u5f97v= GM r \uff0e\u5f0f\u4e2dM\u662f\u5730\u7403\u7684\u8d28\u91cf\uff0cr\u662f\u536b\u661f\u7684\u8f68\u9053\u534a\u5f84\uff0c\u53ef\u89c1\u536b\u661f\u7684\u901f\u5ea6\u4e0e\u536b\u661f\u7684\u8d28\u91cfm\u65e0\u5173\uff0c\u968f\u7740\u8f68\u9053\u534a\u5f84\u7684\u589e\u5927\u800c\u51cf\u5c0f\uff0c\u51cf\u5c0f\u800c\u589e\u5927\uff0e\u6545B\u6b63\u786e\uff0cACD\u9519\u8bef\uff0e\u6545\u9009B
D
\u7b2c\u4e8c\u5b87\u5b99\u901f\u5ea6\u662f\u5730\u7403\u7684\u9003\u9038\u901f\u5ea6
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C 绛旓細杩愬姩鐘舵佹湁涓ょ锛氫竴鏄熷害,浜屾槸鏂瑰悜.鍦ㄦ棰樹腑鍗槦鏄湪鍋氬寑閫鐨鍦嗗懆杩愬姩,鎵浠ヨ繍鍔ㄩ熷害涓嶅彉,浣嗘柟鍚戝湪涓嶆柇鐨勫彉鍖.缁间笂鎵杩帮細鍗槦鐨勮繍鍔ㄧ姸鎬佹槸鍙樺寲鐨 绛旓細鑻浜洪犲崼鏄熺粫鍦扮悆鍋氬寑閫熷渾鍛杩愬姩,閭d箞涓囨湁寮曞姏鍏呭綋鍚戝績鍔 鍥犳G*锛坢 * me锛/R^2 = m* v^2 /R 寮忎腑G涓轰竾鏈夊紩鍔涘父閲忥紝m涓轰汉閫犲崼鏄熻川閲忥紝me涓哄湴鐞冭川閲忥紝R涓轰汉閫犲崼鏄熻建閬撳崐寰勶紝v涓轰汉閫犲崼鏄熷仛鍖閫熷渾鍛ㄨ繍鍔ㄧ殑绾块熷害锛屽绛夊紡鍖栫畝锛屾湁锛欸 * me / R = v^2锛 鍗 v= 鈭歔(G * me)/R]锛孏... 绛旓細浜洪犲湴鐞冨崼鏄熺粫鍦扮悆鍋氬寑閫熷渾鍛杩愬姩锛屼竾鏈夊紩鍔涙彁渚涘悜蹇冨姏锛屽垯鏈塆Mmr2=mv2r=m蠅2r=m4蟺2rT2蠅=GMr3锛寁=GMr锛孴=2蟺r3GM鍙锛屽崼鏄熺殑杞ㄩ亾鍗婂緞瓒婂ぇ锛屼竾鏈夊紩鍔涜秺灏忥紝瑙掗熷害瓒婂皬锛岀嚎閫熷害瓒婂皬锛岃屽懆鏈熻秺澶э紟鏁匔D姝g‘锛孉B閿欒锛庢晠閫塁D 绛旓細鍦伴潰瓒婅繙鍗槦閫熷害瓒婃參锛岃繖璇存槑涓囨湁寮曞姏瓒婂皬锛屼骇鐢熺殑杞ㄩ亾鍔ㄥ姏瓒婂皬銆傛墍浠ュ湴闈㈣秺杩滀竾鏈夊紩鍔涜秺灏忔槸瀵圭殑銆傚畤瀹欓熷害鏄弧瓒冲崼鏄熻揪鍒板娍鑳介珮搴︾殑鍔ㄨ兘锛屽鏋滆揪涓嶅埌绗簩瀹囧畽閫熷害锛屽崼鏄熺殑鍔ㄨ兘灏辨棤娉曡揪鍒板啿鍑鍦扮悆纾佸満楂樺害鐨勫娍鑳斤紝鎵浠ヤ笉鑳界敤瀹囧畽閫熷害鏉ヨ鏄庯紝鍦伴潰瓒婅繙涓囨湁寮曞姏瓒婂皬鏄敊鐨勩傚惁鍒欎竾鏈夊紩鍔涘畾寰嬪氨寰楅噸鏂版敼鍐... 绛旓細浜洪犲湴鐞冨崼鏄熺粫鍦扮悆鍋氬寑閫熷渾鍛杩愬姩锛岀敱涓囨湁寮曞姏鎻愪緵鍚戝績鍔涳紝鍗 GMm r 2 = m ?4蟺 2 r T 2 =m蠅 2 r=maA銆佸悜蹇冨姞閫熷害a= GM r 2 锛屽崼鏄熺殑杞ㄩ亾鍗婂緞鍙樹负鍒板師鏉ョ殑2鍊嶆椂锛屾墍浠ュ崼鏄熺殑鍚戝績鍔犻熷害鍙樹负鍒板師鏉ョ殑0.25鍊嶏紝鏁匒姝g‘锛汢銆佽閫熷害蠅= GM... 绛旓細A銆鍗槦鍋氬寑閫熷渾鍛杩愬姩锛屼竾鏈夊紩鍔涙彁渚涘悜蹇冨姏锛屼笉鏄噸澶嶅彈鍔涳紝鏁匒閿欒锛汢銆佸崼鏄熷仛鍖閫熷渾鍛ㄨ繍鍔紝閫熷害澶у皬涓嶅彉锛屼絾鏂瑰悜鏃跺埢鏀瑰彉锛屽姩閲忓ぇ灏廝=mv锛屾柟鍚戜笌閫熷害鏂瑰悜鐩稿悓锛屾晠鍔ㄩ噺鏄彉閲忥紝鏁匓閿欒锛汣銆佸崼鏄熷仛鍖閫熷渾鍛ㄨ繍鍔紝鍦ㄧ粫琛屼竴鍛ㄧ殑杩囩▼涓紝鍔ㄩ噺鐨勬敼鍙橀噺涓洪浂锛屾牴鎹姩閲忓畾鐞嗭紝涓囨湁寮曞姏瀵瑰崼鏄熶骇鐢熺殑鍐查噺涓洪浂... 绛旓細BD 璇曢鍒嗘瀽锛浜洪犲崼鏄熷仛鍦嗗懆杩愬姩锛屼竾鏈夊紩鍔涙彁渚涘悜蹇冨姏锛屽嵆锛 锛岀敱浜 銆 銆 涓嶅彉锛屾墍浠褰撳崼鏄熺粫鍦扮悆杩愬姩鐨勮建閬撳崐寰勫澶у埌鍘熸潵鐨2鍊嶆椂锛屽崼鏄熸墍鍙楃殑鍚戝績鍔涘皢鍑忓皬鍒板師鏉ョ殑鍥涘垎涔嬩竴锛屾晠B姝g‘锛涙牴鎹墰椤跨浜屽畾寰嬪緱锛 锛岃В寰楋細 锛 鎵浠ワ紝褰撳崼鏄熺粫鍦扮悆杩愬姩鐨勮建閬撳崐寰勫澶у埌鍘熸潵鐨2鍊嶆椂锛... 绛旓細瀵笰,濡傛灉浠呬粎绾块熷害鍑忎负鍘熸潵鐨勪竴鍗婏紝閭d箞鐢盙Mm/R骞虫柟=mv骞虫柟/R鐭ワ紝GM=Rv骞虫柟锛岄偅涔堝崐寰勫皢鍙樹负鍘熸潵鐨勫洓鍒嗕箣涓锛屾墍浠閿欙紱瀵笲,鍚岀悊锛屽鏋滃崐寰勫彉涓哄師鏉ョ殑涓ゅ嶏紝鍒欑嚎閫熷害涔熺浉搴斿彉涓哄師鏉ョ殑鏍瑰彿浜屽嶏紝鎵浠ョ嚎閫熷害涓嶅彲鑳戒笉鍙樸傛晠AB閿欒锛 绛旓細浜洪犲崼鏄熷仛鍖閫熷渾鍛杩愬姩鏃讹紝涓囨湁寮曞姏鎻愪緵鍚戝績鍔涳紝鍒欏緱锛欸Mmr2锛漨v2r锛漨4蟺2T2rAD銆佺嚎閫熷害v=GMr锛鍗槦缁曞湴鐞杩愬姩鐨勮建閬撳崐寰勫澶у埌鍘熸潵鐨2鍊嶆椂锛屽崼鏄熻繍鍔ㄧ殑绾块熷害灏嗗噺灏忓埌鍘熸潵鐨22锛屾晠A閿欒锛孌姝g‘锛汢銆佸崼鏄熸墍鍙楃殑鍚戝績鍔汧=GMmr2锛屽崼鏄熺粫鍦扮悆杩愬姩鐨勮建閬撳崐寰勫澶у埌鍘熸潵鐨2鍊嶆椂锛屾墍浠ュ悜蹇冨姏灏嗗噺灏忓埌... 绛旓細鏍规嵁涓囨湁寮曞姏鎻愪緵鍚戝績鍔涳紝GMmr2=ma=mv2r=mr蠅2=mr4蟺2T2锛屽緱锛歛=GMr2锛寁=GMr锛屜=GMr3T=2蟺r3GM锛庡彲鐭瓒婂皬锛屽悜蹇冨姞閫熷害瓒婂ぇ锛岀嚎閫熷害瓒婂ぇ锛岃閫熷害瓒婂ぇ锛屽懆鏈熻秺灏忥紟鏁匓銆丏閿欙紝A銆丆瀵癸紟鏁呴堿C锛 本站交流只代表网友个人观点,与本站立场无关 |