1、 - 1 - 01 1 (2017 ) 1 5 0.1s 0 1 2 3 4 2 A B C D B C D A A 1 m/s m/s 2 2. 2017 1 - 2 - 2 O D _cm 3 s-t 2 s _ _m/s 2 1 2 1.20 3 1 2 a 0.467 3 2017 1 2 3 4 5 6 /s 0.1 0.2 0.3 0.4 0.5 0.6 /(cm/s) 44.0 62.0 81.0 100.0 110.0 168.0 ( ) A. t v a B. v-t a C. v-t t v a D. , - 3 - C 4 2017 A B C D E F G 7 4 f
2、=50Hz 1 s 2 E vE= 3 d6=65.00cm d3=19.00cm a= m/s 2 4 f 50Hz 1 0.1 2 53 10 dd f 3 3.0 4 1 50HZ 0.02s 4 T=5 1/f=0.1s 2 vE= 53 2 dd T = 53 10 dd f 3 x=aT 2 a= 6 3 3 2 9 d d d T = 2 0.65 0.19 0.19 9 0.1 m/s 2 =3.0m/s 2 4 f 50Hz x=at 2 - 4 - 5 2017 s 4.90cm m/s m/s 2 3 0.984 9.77 2 1 3 x1 3 5 x2 x=gt 2 x
3、2 x1=gt 2 t x1 x2 t= s 13. 60 4.90 4.90+0.54 10 2 =a g=9.77m/s 2 - 5 - 6 )(6 ) (a) M N M N x1 x2 (b) d (1) M _( ) (2) _( ) (3) (c) _cm (1) d t1(2) d 2 2 x2 x1 ( 1 t 2 2 1 t 2 1 ) (3)0.440 - 6 - 7 )(6 ) (1) _( _( (2) 5 ( 0.1 s 0.1 s ) _( _ m/s 2 ( ) t/0.1 s 1 2 3 4 5 6 xn/cm 1.45 2.45 3.46 4.44 5.45 6.46 - 7 - (1) (2) 0.95 1.1 m/s 28 ) (1) 50 Hz _ (2) ABCD A B s _ cm C _ m/s _ m/s 2 ( ) (1)0.02 s (2)0.70 0.50 5.0
