A.0.08s B.0.12s C.0.14s D.0.16s 查看更多

 

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一列簡(jiǎn)諧橫波沿x軸正方向傳播,頻率為5Hz,某時(shí)刻的波形如圖所示,介質(zhì)中質(zhì)點(diǎn)A在距原點(diǎn)8cm處,質(zhì)點(diǎn)B在距原點(diǎn)16cm處,從圖象對(duì)應(yīng)時(shí)刻算起,質(zhì)點(diǎn)A的運(yùn)動(dòng)狀態(tài)與圖示時(shí)刻質(zhì)點(diǎn)B的運(yùn)動(dòng)狀態(tài)相同所需的最短時(shí)間為

  

A.0.08s      B.0.12s     C.0.14s     D.0.16s

 

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一列簡(jiǎn)諧橫波沿x軸正方向傳播,頻率為5Hz,某時(shí)刻的波形如圖所示,介質(zhì)中質(zhì)點(diǎn)A在距原點(diǎn)8cm處,質(zhì)點(diǎn)B在距原點(diǎn)16cm處,從圖象對(duì)應(yīng)時(shí)刻算起,質(zhì)點(diǎn)A的運(yùn)動(dòng)狀態(tài)與圖示時(shí)刻質(zhì)點(diǎn)B的運(yùn)動(dòng)狀態(tài)相同所需的最短時(shí)間為

A.0.08s      B.0.12s     C.0.14s     D.0.16s

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一列簡(jiǎn)諧橫波沿x軸正方向傳播,頻率為5Hz,某時(shí)刻的波形如圖所示,介質(zhì)中質(zhì)點(diǎn)A在距原點(diǎn)8cm處,質(zhì)點(diǎn)B在距原點(diǎn)16cm處,從圖象對(duì)應(yīng)時(shí)刻算起,質(zhì)點(diǎn)A的運(yùn)動(dòng)狀態(tài)與圖示時(shí)刻質(zhì)點(diǎn)B的運(yùn)動(dòng)狀態(tài)相同所需的最短時(shí)間為

  

A.0.08s      B.0.12s    C.0.14s     D.0.16s

 

查看答案和解析>>

一列簡(jiǎn)諧橫波沿x軸正方向傳播,頻率為5Hz,某時(shí)刻的波形如圖所示,介質(zhì)中質(zhì)點(diǎn)A在距原點(diǎn)8cm處,質(zhì)點(diǎn)B在距原點(diǎn)16cm處,從圖象對(duì)應(yīng)時(shí)刻算起,質(zhì)點(diǎn)A的運(yùn)動(dòng)狀態(tài)與圖示時(shí)刻質(zhì)點(diǎn)B的運(yùn)動(dòng)狀態(tài)相同需要的最短時(shí)間為(  )

A.0.08s        B.0.12s        C.0.14s        D.0.16s

 

查看答案和解析>>

一列簡(jiǎn)諧橫波沿x軸正方向傳播,頻率為5Hz,某時(shí)刻的波形如圖所示,介質(zhì)中質(zhì)點(diǎn)A在距原點(diǎn)8cm處,質(zhì)點(diǎn)B在距原點(diǎn)16cm處,從圖象對(duì)應(yīng)時(shí)刻算起,質(zhì)點(diǎn)A的運(yùn)動(dòng)狀態(tài)與圖示時(shí)刻質(zhì)點(diǎn)B的運(yùn)動(dòng)狀態(tài)相同需要的最短時(shí)間為(  )

A.0.08s        B.0.12s        C.0.14s        D.0.16s

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一、選擇題:共12小題,共48分。全選對(duì)得4分,選對(duì)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、實(shí)驗(yàn)題:共3小題,共23分。

13.(4分)BD

14.(9分)

   (1)ACD

   (2)AD

   (3)CD

評(píng)分標(biāo)準(zhǔn):每空3分,選對(duì)但不全得2分。

15.(10分)

   (1)如圖所示

   (2)閉合S1、S2,讀出電壓表讀數(shù)U1

        保持S1閉合,斷開S2,讀出電壓數(shù)讀U2;

   (3)6ec8aac122bd4f6e

三、計(jì)算題:共6小題,共79分

16.(12分)

受試者加速過程中

6ec8aac122bd4f6e                                                               ①

6ec8aac122bd4f6e                                                                 ②

勻速過程中

6ec8aac122bd4f6e                                                                 ③

減速過程中

6ec8aac122bd4f6e                                                              ④

6ec8aac122bd4f6e

6ec8aac122bd4f6e6ec8aac122bd4f6e                                                          ⑤

6ec8aac122bd4f6e                                                           ⑥

受試者10m折返跑的時(shí)間

6ec8aac122bd4f6e                                                           ⑦

評(píng)分標(biāo)準(zhǔn):①②③④⑦式各2分,⑤⑥式各1分。

17.(12分)

力F作用時(shí)

6ec8aac122bd4f6e                                            ①

6ec8aac122bd4f6e                                                   ②

2s末物體的速度

6ec8aac122bd4f6e                                                                  ③

撤去F物體停止的過程中

6ec8aac122bd4f6e                                                   ④

6ec8aac122bd4f6e                                                           ⑤

6ec8aac122bd4f6e                                                                ⑥

6ec8aac122bd4f6e                                                                 ⑦

評(píng)分標(biāo)準(zhǔn):①式3分,②④⑤式各2分,③⑥⑦式各1分。

18.(12分)

電子經(jīng)電場(chǎng)加速后

6ec8aac122bd4f6e                                                             ①

電子進(jìn)入磁場(chǎng)后

6ec8aac122bd4f6e                                                                 ②

6ec8aac122bd4f6e                                                       ③

6ec8aac122bd4f6e                                                           ④

評(píng)分標(biāo)準(zhǔn):①②式各3分,③式4分 ,④式2分。

19(14分)

   (1)a棒向上運(yùn)動(dòng)時(shí)

6ec8aac122bd4f6e                                  ①

對(duì)于棒b

6ec8aac122bd4f6e                                                                ②

b棒下滑到最大速度時(shí)

6ec8aac122bd4f6e                               ③

對(duì)于棒b

6ec8aac122bd4f6e                                                               ④

6ec8aac122bd4f6e                                                             ⑤

   (2)在磁感應(yīng)強(qiáng)度增大的過程中

6ec8aac122bd4f6e                                                            ⑥

6ec8aac122bd4f6e                                                   

6ec8aac122bd4f6e                                                              ⑦

6ec8aac122bd4f6e                                                                ⑧

h=1m                                                                     ⑨

評(píng)分標(biāo)準(zhǔn):①式3分,②④⑤⑧⑨式各1分,③⑥⑦式各2分。

20.(14分)

   (1)質(zhì)量為m0的物體在月球上時(shí)

    6ec8aac122bd4f6e                                                           ①

衛(wèi)星在高度為h的軌道上運(yùn)行時(shí)

6ec8aac122bd4f6e                                                     ②

6ec8aac122bd4f6e                                                    ③

(2)“嫦娥一號(hào)”噴出氣體前后

6ec8aac122bd4f6e                                                  ④

6ec8aac122bd4f6e

“嫦娥一號(hào)”在下落過程中

6ec8aac122bd4f6e                                                     ⑤

6ec8aac122bd4f6e                                                           ⑥

評(píng)分標(biāo)準(zhǔn):①②④⑤式各3分,③⑥式各1分。

21.(15分)

   (1)A球與B球第一次碰撞前做勻速直線運(yùn)動(dòng)

6ec8aac122bd4f6e                                                                 ①

6ec8aac122bd4f6e                                                                ②

6ec8aac122bd4f6e

(2)A與B第一次碰撞時(shí)速度為v0

 6ec8aac122bd4f6e                                                                ③

A與B第一次碰撞后A的速度為v1,B的速度為V1

6ec8aac122bd4f6e                                                         ④

6ec8aac122bd4f6e                                                   ⑤

6ec8aac122bd4f6e6ec8aac122bd4f6e

第一次碰撞后經(jīng)過t2時(shí)間AB兩球再次相碰

6ec8aac122bd4f6e                                                              ⑥

6ec8aac122bd4f6e                                                             ⑦

   (3)A、B第二次碰撞后速度分別為v2和V2

6ec8aac122bd4f6e                                                ⑧

6ec8aac122bd4f6e                                       ⑨

6ec8aac122bd4f6e

第二次碰撞后到第三次碰撞時(shí)

        1. 6ec8aac122bd4f6e                            (11)

          A球第三次與B碰撞時(shí)

          6ec8aac122bd4f6e                  (12)

          圖象如圖所示

          評(píng)分標(biāo)準(zhǔn):①②④⑤式各2分,③⑥⑦式各1分,(3)問圖線4分,只按圖給分。

           

           


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