1、1. C 2. D 3. A 4. D 5. B 6.D 7. C 8.B 9. 10. 11. 12. 13. 14. 15. 1 0.6 0.6 16. = 17. 0.54 75 18. 1:1 1:4 15 19. (1)(2)(3) (4)(5)(6) 20. (1)(a)3.20(b)4.6 (2) 0.2 0.8 21. (1) (2) 22. (1)(2)C(3)2.50.240.6(4)(5)0.1U /(II ) 21 23.(1) 3 F =G =610 N 3333 V = F /g=610 N/(1.010 kg/m10N/kg) =0.6 m 1. C 2. D 3
2、. A 4. D 5. B 6.D 7. C 8.B 9. 10. 11. 12. 13. 14. 15. 1 0.6 0.6 16. = 17. 0.54 75 18. 1:1 1:4 15 19. (1)(2)(3) (4)(5)(6) 20. (1)(a)3.20(b)4.6 (2) 0.2 0.8 21. (1) (2) 22. (1)(2)C(3)2.50.240.6(4)(5)0.1U /(II ) 23.(1) F =G =610 N V = F /g=610 N/(1.010 kg/m10N/kg) =0.6 m 21 3 3333 3222 (2)F =G=610 N S=4
3、S =4200cm =800 cm =0.08 m 1 324 P= F /S=610 N/0.08 m =7.510 Pa (3)S=vt=10m/s560s=3000m 3 :F =f=0.1G=0.1610 N=600N) 6 W=F s=600N3000m=1.810 J 22 24. (1)R=U/P =(220v) /40w=1210 (2) I=I=U /R =220V/(1210+1210)=1/11A L U= IR =1/11A1210=110v LLL (3)P= UI=110v1/11A=10w P =40w LLL 10w40w 55 25. (1)2.75 (2)3
4、.02410 (3)2.68810 (4)500 () 26. (1)V=S/t (2) (3)0.3(4)(5) () 27. (1)10(2)1200(3) (4)95(5) 28. 2.7 0.1 1300 200 420 29. (1) S (2)1500 0.90 (3)(). () (4)SR.() 22 . 3222 (2)F =G=610 N S=4S =4200cm =800 cm =0.08 m 1 324 P= F /S=610 N/0.08 m =7.510 Pa (3)S=vt=10m/s560s=3000m 3 :F =f=0.1G=0.1610 N=600N) 6
5、 W=F s=600N3000m=1.810 J 22 24. (1)R=U/P =(220v) /40w=1210 (2) I=I=U /R =220V/(1210+1210)=1/11A L U= IR =1/11A1210=110v LLL (3)P= UI=110v1/11A=10w P =40w LLL 10w40w 55 25. (1)2.75 (2)3.02410 (3)2.68810 (4)500 () 26. (1)V=S/t (2) (3)0.3(4)(5) () 27. (1)10(2)1200(3) (4)95(5) 28. 2.7 0.1 1300 200 420 29. (1) S (2)1500 0.90 (3)(). () (4)SR.() 22 .
