摘要:③ ④ A.a.b都是电子 B.b.c.d都是中子 C.c是中子.d是a粒子 D.a是a粒子.d是中子

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一、选择题:共12小题,共48分。全选对得4分,选对但不全得2分。

1.BD    2.A    3.C    4.AD    5.AB    6.BD    7.A    8.B

9.C     10.D      11.B          12.B

二、实验题:共3小题,共23分。

13.(4分)BD

14.(9分)

   (1)ACD

   (2)AD

   (3)CD

评分标准:每空3分,选对但不全得2分。

15.(10分)

   (1)如图所示

   (2)闭合S1、S2,读出电压表读数U1

        保持S1闭合,断开S2,读出电压数读U2

   (3)6ec8aac122bd4f6e

三、计算题:共6小题,共79分

16.(12分)

受试者加速过程中

6ec8aac122bd4f6e                                                               ①

6ec8aac122bd4f6e                                                                 ②

匀速过程中

6ec8aac122bd4f6e                                                                 ③

减速过程中

6ec8aac122bd4f6e                                                              ④

6ec8aac122bd4f6e

6ec8aac122bd4f6e6ec8aac122bd4f6e                                                          ⑤

6ec8aac122bd4f6e                                                           ⑥

受试者10m折返跑的时间

6ec8aac122bd4f6e                                                           ⑦

评分标准:①②③④⑦式各2分,⑤⑥式各1分。

17.(12分)

力F作用时

6ec8aac122bd4f6e                                            ①

6ec8aac122bd4f6e                                                   ②

2s末物体的速度

6ec8aac122bd4f6e                                                                  ③

撤去F物体停止的过程中

6ec8aac122bd4f6e                                                   ④

6ec8aac122bd4f6e                                                           ⑤

6ec8aac122bd4f6e                                                                ⑥

6ec8aac122bd4f6e                                                                 ⑦

评分标准:①式3分,②④⑤式各2分,③⑥⑦式各1分。

18.(12分)

电子经电场加速后

6ec8aac122bd4f6e                                                             ①

电子进入磁场后

6ec8aac122bd4f6e                                                                 ②

6ec8aac122bd4f6e                                                       ③

6ec8aac122bd4f6e                                                           ④

评分标准:①②式各3分,③式4分 ,④式2分。

19(14分)

   (1)a棒向上运动时

6ec8aac122bd4f6e                                  ①

对于棒b

6ec8aac122bd4f6e                                                                ②

b棒下滑到最大速度时

6ec8aac122bd4f6e                               ③

对于棒b

6ec8aac122bd4f6e                                                               ④

6ec8aac122bd4f6e                                                             ⑤

   (2)在磁感应强度增大的过程中

6ec8aac122bd4f6e                                                            ⑥

6ec8aac122bd4f6e                                                   

6ec8aac122bd4f6e                                                              ⑦

6ec8aac122bd4f6e                                                                ⑧

h=1m                                                                     ⑨

评分标准:①式3分,②④⑤⑧⑨式各1分,③⑥⑦式各2分。

20.(14分)

   (1)质量为m0的物体在月球上时

    6ec8aac122bd4f6e                                                           ①

卫星在高度为h的轨道上运行时

6ec8aac122bd4f6e                                                     ②

6ec8aac122bd4f6e                                                    ③

(2)“嫦娥一号”喷出气体前后

6ec8aac122bd4f6e                                                  ④

6ec8aac122bd4f6e

“嫦娥一号”在下落过程中

6ec8aac122bd4f6e                                                     ⑤

6ec8aac122bd4f6e                                                           ⑥

评分标准:①②④⑤式各3分,③⑥式各1分。

21.(15分)

   (1)A球与B球第一次碰撞前做匀速直线运动

6ec8aac122bd4f6e                                                                 ①

6ec8aac122bd4f6e                                                                ②

6ec8aac122bd4f6e

(2)A与B第一次碰撞时速度为v0

 6ec8aac122bd4f6e                                                                ③

A与B第一次碰撞后A的速度为v1,B的速度为V1

6ec8aac122bd4f6e                                                         ④

6ec8aac122bd4f6e                                                   ⑤

6ec8aac122bd4f6e6ec8aac122bd4f6e

第一次碰撞后经过t2时间AB两球再次相碰

6ec8aac122bd4f6e                                                              ⑥

6ec8aac122bd4f6e                                                             ⑦

   (3)A、B第二次碰撞后速度分别为v2和V2

6ec8aac122bd4f6e                                                ⑧

6ec8aac122bd4f6e                                       ⑨

6ec8aac122bd4f6e

第二次碰撞后到第三次碰撞时

6ec8aac122bd4f6e                            (11)

A球第三次与B碰撞时

6ec8aac122bd4f6e                  (12)

图象如图所示

评分标准:①②④⑤式各2分,③⑥⑦式各1分,(3)问图线4分,只按图给分。

 

 

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