1、 2016-2017 6 28 100 90 1 0.5 2 2B 0.5 3 2B 0.5 12 2 24 1 2 A B C D 3 A B C D 4 20s A 4W B 30W C 150W D 1200W 5 A B C D 6 A B C D 7 2016 10 17 A B C D 8 A B C D 9 10s 5N 1m 1N A F 5J B F 0.6W C F 2J D 80% 10 F1 F2 F1 F2 F1 F2 W1 W2 P1 P2 A W1W2 P1P2 B W1P2 11 A B C D 12 h h h h h l1 l2 l3 l1 l2 l3 F
2、F 1 F 2 l 1 l 2 l 3 h h m =m A h h B C v v D m m 9 1 28 13 100kg J 14 60N 200N 4s 8m N J W 15 40 16 A 0.5N 1 B 2 C N 17 200N 10m 125N J J l00N / /min 5 10 15 20 0 20 O A B A C A 10 16 17 18 18 500g 20 10 Q= J c 3 J/ 15min 10min 19 4g 10g F/N h/cm 0 5 15 10 4 2 19 20 21 20 21 F h N h=2.5cm N h=10cm J
3、 7 48 26 27 28 22 1 O F 2 OBA A F O B A 22 1 22 2 3 23 A B 1 2 B 3 A B C 4 F 22 3 A h B $ & s 木 板 24 A B 1 2 3 4 A B A B A B cA: cB= 25 G /N G/N h/m F/N s/m /% 1 0.3 1 0.1 0.7 0.2 71.4 2 0.3 2 0.1 1.3 0.2 76.9 3 0.3 4 0.1 0.2 1 2 2 3 2 3 A B / 50 40 A 30 20 10 /min $ & 0 1 3 B 4 2 5 N % 3 J J 4 26 A
4、OB O A 400N AO OB 50cm 40cm 600N B 1 F 2 A G 3 27 A A F 500N A 5s 1m 80% 1 F P 2 A GA 3 G 28 60% 30% 25m/s 1h 6.4kg 20kW q 7 J/kg . 1 f 2 FA O B A 3 50% 16kg 20kW 25m/s 400km 2016-2017 12 2 24 1 2 3 4 5 6 7 8 9 10 11 12 B C D C D A C A B C D D 9 1 28 13 2.52 10 7 14 60 480 120 15 10 20 16 2 0.8 17 2
5、000 2500 80% 18 1 10 4 19 20 21 4 2 0.2 7 48 22 1 2 3 2 6 O B A 22 1 22 2 22 3 O l F l F23 1 1 B s 1 2 1 B 1 3 C 2 4 1 24 1 1 2 1 3 1 4 A 1 2:1 1 25 1 1 2 2.4 1 83.3 1 3 0.04 1 0. 03 1 1 4 1 26 7 1 F OB=G OA 1 1 F=375N 1 2 F OB=G OA 1 F=480N 1 3 1 1 27 8 1 W=FS W=1000J 1 P=W/t P=200W 1 2 W =W 1 W =800J 1 GA= W /h 1 GA=800N 1 3 F= GA+G /2 1 G =200N 1 28 8 1 f=P/v 1 f=800N 1 2 =(W/Q) 100% 1 =(Pt/qm) 100% 1 =25% 1 3 =(W/Q) 100% =(FS/qm) 100% 1 S=4.5 10 5 m 1 S400Km 400km 1
