2½ͧڲеʻٶȣ 3½ͧڲǣĹʣ
34. 8.0֣ ѩżؿƱҹļؿ촬ƱԼΪ10000֣ѩͨΪ10m/s1m㺣ƱΪ3.6km/hΪ1.5107NѩֺʱǣĹȣ㣺
1ѩ1m㺣ʻ20min˷ĹǶ٣ 2ѩͨʻʱǣĴСǶ٣
3ѩŲ100ֵʺˮȴﵽ8mܵˮѹǿǶ٣ѩſˮ˶٣Ѻˮ=1.0103kg/m3 g=10N/kg
13 ҳ 18 ҳ
ο
һ ѡ⣨ÿС2֣30֣ (15⣻30)
1-1
2-1
3-1
4-1
5-1
6-1
7-1
8-1
9-1
10-1
11-1
12-1
13-1
14-1
15-1
⣨ÿո1֣36֣
11⣻35)
14 ҳ 18 ҳ
(16-1
16-2
16-3
17-1
18-1
19-1
19-2
20-1
20-2
21-1
21-2
21-3
22-1
23-1
24-1
15 ҳ 18 ҳ
24-2
24-3
25-1
26-1
ѧ̽⣨ÿ1֣15֣ (5⣻15)
27-1
27-2
27-3
28-1
28-2
28-3
28-4
29-1
29-2 29-3
16 ҳ 18 ҳ