如图是工厂里的流水线上安装的传送带示意图，它用斜面和水平的传送带来传送货物，这样可以大大提高工作效 如图所示，在工厂的流水线上安装水平传送带，用来传送工作，可大...
\uff082009?\u5185\u6c5f\uff09\u5982\u56fe\u6240\u793a\uff0c\u662f\u5de5\u5382\u91cc\u7684\u6d41\u6c34\u7ebf\u4e0a\u5b89\u88c5\u7684\u4f20\u9001\u5e26\u793a\u610f\u56fe\uff0c\u5b83\u7528\u6c34\u5e73\u7684\u4f20\u9001\u5e26\u6765\u4f20\u9001\u8d27\u7269\uff0c\u8fd9\u6837\u53ef\u4ee5\uff081\uff09\u2235v=st\uff0c\u2234t=sv=25m2m/s=12.5s\uff1b\uff082\uff09G=mg=0.5kg\u00d710N/kg=5N\uff0c\u7531\u56fe\u53ef\u77e5\uff0c\u7269\u4f53\u505a\u6c34\u5e73\u65b9\u5411\u5411\u53f3\u6052\u5b9a\u901f\u5ea6\u8fd0\u52a8\uff0c\u6240\u4ee5\u7269\u4f53\u53d7\u5230\u4e24\u4e2a\u529b\uff1a\u5b83\u7684\u91cd\u529bG\uff0c\u4f20\u9001\u5e26\u5bf9\u5b83\u7684\u652f\u6301\u529bF\uff0c\u8fd9\u4e24\u4e2a\u529b\u662f\u4e00\u5bf9\u5e73\u8861\u529b\uff0c\u6545\u5408\u529b\u4e3a0\uff0e\u7b54\uff1a\uff081\uff09\u5728\u6c34\u5e73\u4f20\u9001\u5e26\u4e0a\uff0c\u8d27\u7269\u4eceA\u7aef\u8fd0\u52a8\u5230B\u7aef\u7684\u65f6\u95f4\u662f12.5s\uff1b\uff082\uff09\u6bcf\u4ef6\u8d27\u7269\u6240\u53d7\u5230\u7684\u5408\u529b\u4e3a0\uff0e
\uff081\uff09\u6839\u636e\u52a8\u80fd\u5b9a\u7406\u5f97\uff0cmgh=12mvB2?0\uff0c\u89e3\u5f97vB\uff1d2gh\uff1d2\u00d710\u00d70.45m/s\uff1d3m/s\uff0e\uff082\uff09\u6ed1\u52a8\u6469\u64e6\u529b\u7684\u5927\u5c0ff=\u03bcmg=0.1\u00d710N=1N\uff0e\u6839\u636e\u725b\u987f\u7b2c\u4e8c\u5b9a\u5f8b\u5f97\uff0c\u5de5\u4ef6\u5300\u51cf\u901f\u76f4\u7ebf\u8fd0\u52a8\u7684\u52a0\u901f\u5ea6\u5927\u5c0fa=\u03bcmgm\uff1d\u03bcg\uff1d1m/s2\uff0e\u6839\u636e\u901f\u5ea6\u4f4d\u79fb\u516c\u5f0f\u5f97\uff0cx=vB22a\uff1d92m\uff1d4.5m\uff0e\uff083\uff09\u7269\u5757\u6ed1\u4e0a\u4f20\u9001\u5e26\u505a\u5300\u51cf\u901f\u76f4\u7ebf\u8fd0\u52a8\uff0c\u5f53\u901f\u5ea6\u51cf\u5c0f\u52302m/s\u65f6\uff0c\u7ecf\u5386\u7684\u4f4d\u79fbx\u2032\uff1dvB2?v22a\uff1d9?42m\uff1d2.5m\uff1c5m\u6240\u4ee5\u5de5\u4ef6\u5230\u8fbe\u4f20\u9001\u5e26\u6700\u53f3\u7aefC\u70b9\u7684\u901f\u5ea6\u4e3a2m/s\uff0e\u7b54\uff1a\uff081\uff09\u5de5\u4ef6\u6ed1\u81f3B\u70b9\u65f6\u7684\u901f\u5ea6\u4e3a3m/s\uff0e\uff082\uff09\u5de5\u4ef6\u5728\u4f20\u9001\u5e26\u4e0a\u53d7\u5230\u7684\u6ed1\u52a8\u6469\u64e6\u529b\u4e3a1N\uff0c\u6ed1\u884c\u7684\u6700\u5927\u8ddd\u79bb\u4e3a4.5m\uff0e\uff083\uff09\u5de5\u4ef6\u5230\u8fbe\u4f20\u9001\u5e26\u6700\u53f3\u7aefC\u70b9\u65f6\u7684\u901f\u5ea6\u4e3a2m/s\uff0e
（1）设货物在水平传送带上的加速度为a，由牛顿第二定律得：μmg=ma
货物从A处滑上皮带到与皮带相对静止的时间t=
| v?v0 |
| a |
每分钟滑上皮带的货物个数n=
| 60 |
| t |
将（1）中t=
| v?v0 |
| a |
（2）在t时间内水平传送带对地的位移s=vt
由以上三式解得：s=1.5 m
这个距离就是在传送带上相邻两个货物之间的距离．
答：（1）每分钟有80个货物滑上水平传送带．
（2）在水平传送带上，相邻两个相对于传送带静止的货物之间的距离是1.5m．
绛旓細璁捐繍琛岃繃绋嬩腑璐х墿鐨勫姞閫熷害涓篴锛屾牴鎹墰椤跨浜屽畾寰嬪緱锛 渭mg=ma 瑙ｅ緱锛歛=渭g=0.3脳10=m/s2=3m/s2 鍋囪鐗╀綋涓鐩村姞閫燂紝璁惧埌杈綨绔椂閫熷害涓篤锛屽垯锛 V2=2aL 瑙ｅ緱锛歏=2aL=2脳3脳10m/s=215m/s鐢变簬V锛瀡=6m/s锛屾墍浠ョ墿鍏堝姞閫熷悗鍖閫熺洿绾胯繍鍔紟鍒拌揪N鐐圭殑閫熷害涓庝紶閫佸甫閫熷害鐩稿悓涓6m/s鎵浠...
绛旓細锛1锛夌敱棰樼煡锛孯1涓嶳2涓茶仈鎺ュ湪6V鐢垫簮涓婏紝浠庡浘璞′笂鍙煡锛氣憼鏈夊厜鐓у皠鏃讹紝R1涓ょ鐨勭數鍘嬶細U1=3V锛孶2=U-U1=6V-3V=3V锛涘垯I=U2R2=3V20惟=0.15A锛屸埓R1=U1I=3V0.15A=20惟锛涒憽鏃犲厜鐓у皠鏃讹紝R1涓ょ鐨勭數鍘嬶細U1鈥=4V锛孶2鈥=U-U1鈥=6V-4V=2V锛 鍒橧鈥=U2鈥睷2=2V20惟=0.1A锛屸埓R1鈥=U1鈥...
绛旓細瑙ｏ紙1锛夌敱棰樼煡锛孯1涓嶳2涓茶仈鎺ュ湪6V鐢垫簮涓婏紝鈶犳湁鍏夌収灏勬椂锛岄樆鍊艰緝灏忥紝鍒嗗帇杈冨皬U1=3V锛孶2=U-U1=6V-3V=3V锛涒埖I=U1R灏=U2R2锛屸埓R灏=U1R2U2=3V脳20惟3V=20惟鈶℃棤鍏夌収灏勬椂锛岄樆鍊艰緝澶э紝鍒嗗帇杈冨ぇ涓篣鈥1=4V锛孶鈥2=U-U鈥1=6V-4V=2V锛涒埖I=U鈥1R澶=U鈥2R2锛孯澶=U鈥1R2U鈥2=4V...
绛旓細锛1锛夌敱鍥剧煡锛孯1涓嶳2涓茶仈锛屾棤鍏夌収鏃禦1鐨勭數鍘嬩负4V锛屾湁鍏夌収鏃禦1鐨勭數鍘嬩负2V锛氭棤鐓ф椂锛岀數璺腑鐨勭數娴侊細I1=I2=U?U1R2=6V?4V40惟=0.05A锛孯1=U1I1=4V0.05A=80惟锛涙湁鍏夌収鏃讹紝鐢佃矾涓殑鐢垫祦锛欼1'=I2'=U?U鈥1R2=6V?2V40惟=0.1AR1'=U鈥1I鈥1=2V0.1A=20惟锛涳紙2锛夌敱鍥捐薄鐭ワ紝1h鍐...
绛旓細锛氾紙1锛夊厜鏁忕數闃诲湪鏈夊厜鐓у拰鍏夎鎸′綇涓ょ鐘舵佷笅鐨勯樆鍊煎垎鍒负锛20惟鍜40惟锛2锛夋暣鏉＄數璺湪1灏忔椂鍐呮秷鑰楃殑鐢佃兘涓2.88脳103J 锛1锛夌敱棰樼煡锛孯 1 涓嶳 2 涓茶繛鎺ュ湪6V鐢垫簮涓婏紝鈶犳湁鍏夌収灏勬椂锛岄樆鍊艰緝灏忥紝鍒嗗帇杈冨皬U 1 =3V锛孶 2 =U锕 1 =6V锕3V=3V锛涒埖 锛屸埓 鈶℃棤鍏夌収灏勬椂锛岄樆鍊艰緝澶...
绛旓細锛3锛夋湁鍏夌収灏勬椂锛岀數璺數娴侊細I=0.2A锛屾病鏈夊厜鐓у皠鏃讹紝鐢佃矾鐢垫祦I鈥=U2鈥睷2=U?U1R2=6V?4V20惟=0.1A锛岀敱鍥句箼鎵绀哄浘璞″彲鐭ワ紝涓涓懆鏈熷唴锛屾湁鍏夌収灏勭殑鏃堕棿涓0.4s锛屾棤鍏夌収灏勭殑鏃堕棿鏄0.2s锛屼竴涓懆鏈0.6s鍐咃紝鐢佃矾娑堣楃殑鐢佃兘锛歐=UIt+UI鈥瞭鈥=6V脳0.2A脳0.4s+6V脳0.1A脳0.2s=0.6J锛1h...
绛旓細鈶聪=kg/m3=0.6脳103 kg/m3 鈶祊=Pa=600Pa 鈶舵湁鍏夌収灏勬椂 U1=2V U2=U锛峌1=4V R1==惟=20惟 鍏夎鎸′綇鏃 U1鈥=4V U2鈥=U锛峌1鈥=2V R1鈥==惟=80惟 鍏夋晱鐢甸樆1h娑堣楃殑鐢佃兘 W1== J=480J W2=锛滼锛240J W鎬伙紳W1锛媁2锛濓紙480锛240锛塉锛720J銆....
绛旓細锛1锛壪=mV=mL3锛0.60.13kg/m3=0.6脳103kg/m3锛2锛塸=FS锛漨gL2锛0.6脳100.12Pa=600Pa锛3锛夋湁鍏夌収灏勬椂U1=2V锛孶2=U-U1=4V锛孯1R2锛漊1U2锛孯1=U1U2R2=24脳40惟=20惟鍏夎鎸′綇鏃禪1鈥=4V锛孶2鈥=U-U1鈥=2V锛孯1鈥睷2=U1鈥睻2鈥诧紝R1鈥=U1鈥睷2U2鈥=42脳40惟=80惟鍏夋晱鐢甸樆1h娑堣楃殑...
绛旓細鍥犳棤鍏夋椂闃诲煎ぇ锛屾湁鍏夋椂闃诲煎皬锛屾晠鏃犲厜鐢靛帇楂橈紝鏈夊厜鐢靛帇浣 1銆乿=0.1/0.2=0.5m/s 2銆乸=mg/S=0.6*10/0.1^2=600Pa 3銆丷1鍏=2/((6-2)/40)=20 娆 R1鏃=4/((6-4)/40)=80 娆 W=锛0.4*2^2/20+0.2*4^2/80)*3600/0.6=720 J 涔熷彲浠ュ厛绠楀嚭骞冲潎鍔熺巼0.2w,鍐嶄箻浠...
绛旓細锛1锛0.5m/s锛2锛10惟锛3锛3600 J 璇曢鍒嗘瀽锛氾紙1锛 m/s锛2锛夋湁鍏夌収鏃讹紝 U 1 =2V鍥犱负涓茶仈锛屾墍浠 鍗 R 1 鏈 锛10惟锛3锛夋湁鍏夌収鏃讹紝 A鏃犲厜鐓ф椂锛 A涓涓懆鏈燂紙鏈夊厜鐓0.4s锛屾棤鍏夌収0.2s锛夋秷鑰楃數鑳斤細 J 1h娑堣楃數鑳斤細 J鐐硅瘎锛氭湰棰樺叧閿湪浜庢牴鎹鎰忓拰绀烘尝鍣ㄦ樉绀...
