高一物理题，急，考试中
\u9ad8\u4e00\u7269\u7406\u9898\uff0c\u6c42\u5927\u795e\u5e2e\u89e3\u7b54 \u4eca\u5929\u7684\u8003\u8bd5\u9898\uff0c\u4e0d\u592a\u4f1a\u505a \u8c22\u8c22\u80fd\u800350\u5206\uff0c\u8bf4\u660e\u57fa\u7840\u4e0d\u9519\uff01\u52a0\u6cb9\uff01\u8003\u8bd5\u62ff\u4e0d\u5230\u5206\uff0c\u8bf4\u660e\u719f\u7ec3\u7a0b\u5ea6\u4e0d\u591f\uff01\u505a\u7684\u9898\u5c11\u4e86\u70b9\uff01
\u6211\u628a\u7ed9\u5176\u5b83\u540c\u5b66\u7684\u7ecf\u9a8c\u4e5f\u53d1\u7ed9\u4f60\uff01http://zhidao.baidu.com/question/553217649997771172
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\u7efc\u4e0a\u6240\u672f\uff0c\u5b66\u4e60\u7269\u7406\u5927\u81f4\u6709\u516d\u4e2a\u5c42\u6b21\uff0c\u5373\u9996\u5148\u542c\u61c2\uff0c\u800c\u540e\u8bb0\u4f4f\uff0c\u7ec3\u4e60\u4f1a\u7528\uff0c\u6e10\u9010\u719f\u7ec3\uff0c\u719f\u80fd\u751f\u5de7\uff0c\u6709\u6240\u521b\u65b0\u3002
GMm/R月^2=m(2π/T)^2R月
得R月=（gR^2T^2/4π^2）的三次方根
2.a=2v/t
ma=GMm/r^2
得M=2vr^2/Gt
像这样天体运动的问题，不会很难。只要牢记那几个公式和一个万能公式，就可以把这些题目解答了。（由于这些公式不好用键盘打出来，故希望你自己专磨一下，那些真的不会太难，我是过来人，今年刚刚毕业）
主要思路：找准物体间的关系。
绛旓細鍦ㄧ鍦癏楂樺害鏃舵煔瀛愮殑鍔ㄨ兘绛変簬閲嶅姏鍔胯兘浜屽垎涔嬩竴锛岃閫熷害涓簐t锛屽垯鏈塵gH=mvt²锛屽洜涓烘煔瀛愬湪杩愬姩杩囩▼涓彧鍙楅噸鍔涳紝鎵浠ュ彲浠ョ敤鑳介噺瀹堟亽鏉ユ眰锛歮gh+1/2mvo²=0+1/2mvt²锛坔=10m锛宮=1Kg锛夎В锛氣懘W鍔=1/2mv²鎵浠鍔=1/2脳1Kg脳100m/s²=50J 鈶佃绂诲湴楂樺害涓篐锛屼笖鐬椂...
绛旓細鏈绠渚跨殑鏂规硶灏辨槸VT鍥 璁癇鐐圭殑鏃堕棿涓篢锛屾渶澶ч熷害涓簐 鍒欐湁0.5*T*v=s1 0.5*(t-T)*v=s2 v=T*a1 鍓嶄袱涓柟绋嬪緱T=t*s1/(s1+s2) v=2(s1+s2)/t 鍥犳a1=v/T=2(s1+s2)^2/(s1*t^2)a2=v/(t-T)=2(s1+s2)^2/(s2*t^2)VT鍥炬槸寰堝ソ鐢ㄧ殑宸ュ叿锛屽湪鑰冭瘯鏃惰兘璧峰埌绠鍖栬绠...
绛旓細1銆傜鍦扮悆瓒婅繎锛屽悜蹇冨姞閫熷害銆佺嚎閫熷害銆佽閫熷害銆佹墍鍙楃殑鍚戝績鍔涜秺澶э紝鍛ㄦ湡瓒婂皬 2. a2>a3>a1 v2>v3>v1 w2>w1=w3 T1=T3>T2 F2>F3>F1 璇﹁В锛氱鍦扮悆瓒婅繎鐨勫崼鏄燂紝鍚戝績鍔犻熷害銆佺嚎閫熷害銆佹墍鍙楃殑鍚戝績鍔涜秺澶э紝鍛ㄦ湡瓒婂皬銆傛晠a2>a3锛寁2>v3锛 w2>w3锛 F2>F3 锛孴3>T2 锛涜丹閬撲笂...
绛旓細(1)鐗╀綋鍔犻熷害涓0.2鍊嶉噸鍔涘姞閫熷害灏变笉闈欐浜嗭紝a=蠅*蠅*r锛屜=30*2*3.14/60=3.14rad/s锛0.2*9.8=3.14*3.14*r锛宺=0.199m (2)璁続鍒板渾蹇冭窛绂籸锛屾寚鍚戝渾蹇冩槸姝ｆ柟鍚戙侫鐨勫姞閫熷害鏄*蠅*r銆傝浆澶揩灏辩敥鍑哄幓锛岃浆澶參灏辨帀涓嬪幓銆侫鐨勫彈鍔涙槸鍚戝渾蹇冪殑mg鎷夊姏锛岃繕鏈変竴涓緞鍚戞懇鎿﹀姏锛屽ぇ灏忔槸...
绛旓細閲嶅姏鍔胯兘鐨勫噺灏戦噺涓何擡p=mg路=蟻Sh2g銆備竴澶╂渶澶氬彂鍑虹數鑳戒负E=2脳鈻矱p脳10锛=0.2脳蟻Sh2g =0.2脳脳1.0脳103脳1.0脳107x22脳10J=4脳10l0J銆傚娴佷綋绫婚噸鍔涘娍鑳界殑鏀瑰彉锛屽皢鎵鏈夋祦鍔ㄧ殑娴佷綋瑙嗕负涓涓暣浣撱傛壘鍑哄叾閲嶅績浣嶇疆鐨勫彉鍖栵紝鏈涓按浣嶉檷浣2m锛屼絾閲嶅績闄嶄綆涓嶆槸2m锛岃屾槸lm銆
绛旓細绗竴棰樺洜涓烘槸鐢遍潤姝㈤噴鏀撅紝V0=0鎵浠ヤ綅绉籜=at²/2 鈭磝/t²=a/2 鈭典笁鐐圭殑鍔犻熷害a鏄浉鍚岀殑 鎵浠瀵癸紝鐢辨鍙互鐪嬪嚭D涓嶅 鍔犻熷害涓鏍凤紝浣嗕綅绉籜1锛瀀2锛瀀3鐢眝=v0t+at寰楃悆1鐨勬湯閫熷害鏈澶э紝鐞3鏈灏忥紝鐢卞钩鍧囬熷害=(v+vo)/2 鍙煡鐞冧竴鐨勫钩鍧囬熷害鏈澶э紝鐞冧笁鏈灏忥紝B涓殑X/t灏辨槸...
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绛旓細2.鏈変竴姹界悆浠5绫虫瘡绉掔殑鍖閫熷害鐢卞湴闈㈠悜涓婄洿鍗囷紝缁忚繃30绉掑悗钀戒笅涓閲嶇墿銆傛眰锛1锛夌墿浣撹缁忚繃澶氶暱鏃堕棿鎵嶈兘钀藉埌鍦伴潰锛燂紙2锛夌墿浣撹揪鍒板湴闈㈤熷害銆傦紙g=10m/s2锛夎В鏋:绗竴棰:瑙:S=vt-gt²/2(寮忎腑v琛ㄧず鐗╀綋鍦ㄩ氳繃绐楀彛鍓嶇殑閫熷害)S=1.5 t=0.1 浠ｅ叆寰:1.5=0.1v-10脳0.01/2 v=14.5m/s 鎵...
绛旓細V'=鈭(gR)銆傚綋閫熷害V>鈭(gR)鏃讹紝鏉嗙粰鎷夊姏锛涘綋閫熷害灏忎簬鈭(gR)鏃讹紝鏉嗙粰鏀寔鍔涖傚綋V=鈭(2/3gR)鏃讹紝鏉嗙粰鐞冣滄敮鎸佸姏鈥濓細mg-Fn=mV²/R Fn=m(g-V²/R)=m(g-2g/3)=(1/3)mg 2.璐ㄩ噺涓簃鐨勫皬鐞冭绯诲湪杞荤怀鐨勪竴绔紝鍦ㄧ珫鐩村钩闈㈠唴鍋氬崐寰勪负R鐨勫渾鍛ㄨ繍鍔紝杩愬姩杩囩▼涓皬鐞冨彈鍒扮┖姘...
绛旓細1銆佽В锛氳绗5绉掑唴鐨勫钩鍧囬熷害涓篤1锛岀7绉掑唴鐨勫钩鍧囬熷害涓篤2 鍒欏畠浠墍瀵瑰簲鐨勪綅绉诲垎鍒负锛歋1=V1鍜孲2=V2 鍗 V2-V1=S2-S1=4 鏁呭叾鍔犻熷害搴斾负锛歛=(V2-V1)/(7-5)= 2 绫虫瘡骞虫柟绉 鐗╀綋鍦ㄤ簲绉掑唴鐨勪綅绉讳负锛歋=V0*t + 1/2a*t^2=0.5*5 + 1/2*2*5^2=27.5 绫 2銆佽В锛氱敱棰樻剰...
