1、 I 48 12 4 48 1. 1s 1m 2s 2m 3s 3m 4s 4m A B 2s 2.5m/s C 3 4 3.5m/s D 1m/s 2 C 1 T x 2 x 1 x 3 x 2 x n x n 1 aT 2 2 v. 3 v 2 A B A A 10m/s B B 5m/s A 1s 1s 5m/s A 1s C B 3s 10m D B 3s 10m : _ _ Z_X_X_K C v t 1 v t 2 v t 3 4 “ ” 3 A B C D B v v v 0 v v v 0 0 a 0 v v 0 v v v 0 0 a 0 4 oa ob cd o a b c
2、 d c a o c t 1 t 2 t 3 a b d A t 1 = t 2 B t 1 t 2 C t 3 t 2 D t 1 t 3 C ob oa 2 oa 2 cos 1 g a ob cos 2 g a ob L oa 2 cos L , 2 1 2 cos , 2 1 2 1 1 2 2 2 t a L t a L cos 2 2 2 g L t g L t 2 2 1 2 1 t t g L t 2 2 3 2 1 3 t t t C A B D 5 A B C D C 6 A B C D D 7 20m/s 5m/s 2 5s 1s A 7.5m/s 5.5m/s B 7.
3、5m/s 5m/s C 8m/s 2m/s D 8m/s 2.5m/s D 1 2 v 3 8 v 2v S 3v 4v A S 2 5B S 3 7C 3S D 4S B : # # Z#X#X#K as v v 2 ) 2 （ 2 2 s a v v 2 ) 3 ( ) 4 （ 2 2 s s 3 7 B 1 2 v 2 v 2ax x v 0 a v 0 a a 3 v 0 0 v 2 2ax v 0 v 2ax 9 x t x=5t+t 2 A 1s 5m B 2s 6m/s C 1s 1m D 1s 2m/s D x v 0 t at 2 1 2 x v 0 t at 2 x v 0
4、 a v 0 a v 0 a a v 0 a 3 a 0 x v 0 t v 0 0 x at 2 10 v A B C D C 1 v gt 2 h gt 2 3 v 2 2gh 11 O 0.8s 8m/s g 10m/s 2 A O B O C O D O B 0.8s 8m/s 10m/s 2 0.8S 8m/s 8m/s 0.8s B v 0 A B C 1 A C t AC C A t CA t AB t BA . : * * 2 A A 12 t=10s 15m A 1.5 m/s B 3 m/s C 4 m/s D : * * B v. II : ZXXK 2 14 13 8
5、a a m b 200g 1 “ ” “ ” 2 b a-m 3 “ ” mg 1 2 3 14 6 “ ” A B C D E F G 7 4 T=0. 02 s d 1 =3.62 cm d 2 =9. 24 cm d 3=16. 85cm d 4 =26. 46 cm d 5 =38. 06 cm d 6 =51. 67 cm. 1 E _m/s _ m/s 2 2 f=49 Hz _ “ ” “ ” “ ” 1 1.06 2.00 2 1 T 0.02s 2 cm m. 3 40 15 12 - 1 t 1 =5s t 2 =8s 2 3 - 1 10m/s 5m/s 2 0s 2s
6、5m/s 2 2s 5s 0 5s 8s -1.7m/s 2 3 1 t 1 =5s 10m/s t 2 =8s 5m/s 2 0s 2s 22 1 10 / 5 / 2 a m s m s 5m/s 2 2s 5s a 2 =0m/s 2 5s 8s 22 3 5 10 / 1.7 / 3 a m s m s 3 - v-t a-t 16 14 “ ” L=6m v 1 =1m/s a 1 =2m/s 2 1 t 2 v 2 =4m/s 4m/s 2 a 2 t 2 2 1 1 2 2 11 22 v t a t v t a t L 97 5 6 ts 17 12 v 1 180km/h v 2 36km/h x 0 5m x 26m l 15m L 学科网 高考一轮复习微课 视频手机 观看地址 ：http:/xkw.so/wksp
