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- 1. 塀 犖 F F犖 F 7 41101 犖 犖 F 7 ( 犖F ) 犖 4 15 F犖 F 7 F F 犖 犖 犖 F 犖犖 犖 ( X ) 犖 犖, , F 犖F 1. F F 1) 犖(W) F F 犖犖 F (m) 2) 犖 犖 W = mg g F 犖 F F 犖 F g = 0( F) F F F 3) F 犖 犖 犖 F F 犖犖 F 犖 F 犖. F 1 2 . F 1 3 . F 2 3 . F 1,2 3 2. F F 1) F F F F F 2) F F F F F F F 3) F 犖 F F F犖 F 犖 F 犖. F 1 2 . F 1 3 . F 2 3 . F 1,2 3 3. F F F 犖 F 犖 F F 犖. 犖 F 3 . F . F 犖 . 犖 犖犖 F 1 F 4. F 犖 F F F F 犖 10 F( )2 F 犖 F F 犖 F F 犖 犖 F犖 犖 犖 F ( )2 犖. 2.5 . 5 . 7.5 . 10 5. 犖 犖 480 犖 犖 犖 犖犖 F F 犖 犖 F犖 3 F 犖 犖. 15 . 24 . 30 . 37
- 2. 6. F 2 F 犖 3 F 犖 犖 540 犖 F 犖 F 犖犖 犖. 120 . 180 . 270 . 360 1 7. F 犖 F F F 犖 犖 F F 4 1 F 犖 F F 犖 F 犖 2 1 1 1 1 犖. . . . 8 9 16 18 8. A 3 F B 犖 A 3 F 犖 B F F F 犖 犖 F犖 FF 犖. A 犖 F F 9 F B . A 犖 F F 3 F B . B 犖 F F 3 F A . 犖 F F F犖 9. A B 2m m F F 犖 犖 犖 犖 F F F 犖 R F A F B 1 1 犖. 2 . 1 . . 2 4 10. 犖 F 9 F F A F F B 1 1 犖. 2 . 1 . . 2 4
- 3. 塀 犖 F 犖 7 犖F ( 41101 ) 犖 幣 4 犖 犖 F 7 犖F F 1 2 3 4 犖 5 6 犖 7 8 9 10