問題詳情
甲、乙兩質量不同的木塊(甲質量:1kg、乙質量:2kg)靜置於水平桌面上，兩木塊分別受水平外力作直線運動，其速度（v）與時間（t）的關係如附圖所示。若 t＝30 s 時，甲、乙兩木塊所受的合力分別為 F 甲、F 乙，則 F 甲：F 乙 應為下列何者？
(A) 1：1
(B) 2：1
(C) 4：1
(D) 1：4。
參考答案
無參考答案
內容推薦
- How long did it_________ Simon_________ the cookies lastweekend?(A) cost ; making (B) spend ; mak
- _________Peter and his wife_________ the subway to theoffice. Now, they drive to work every day.(
- 下列何者不是油壓閥主要控制壓油的物理參數？(A)流量(B)壓力(C)流向(D)溫度。
- Before Janet_________ to the United States, she_________ Englsih for several years.(A) moved; had
- Nick was so_________ _________ the old apartment was largeand comfortable.(A) surprising; at (B)
- 單相電動機使用電解電容器的目的為(A)減少起動(B)增強起動(C)增加馬力(D)增加轉速。
- 轉速計的單位，以分鐘計算應為(A)lpm(B)rpm(C)ppm(D)rps。
- Sandy is wondering _________(A) when will Nancy come back to Taiwan?(B) if Nancy comes back to Ta
- 下列何種元件，可做為物件顏色辨識開關(A)電感式開關(B)磁簧開關(C)光電開關(D)電容式開關。
- ( )北歐多為下列何種海岸地形，因此有利於沿海國家如挪威等對外航運發展？ (A)谷灣 (B)峽灣 (C)岬灣 (D)沙岸。
內容推薦
- 25 如圖為 MOSFET 差動式放大器，已知電晶體 Q1和 Q2的臨界電壓 VTH、轉導 gm、輸出阻抗 ro等參數均相同，試求差動增益 Ad = vod /vid之值？(A) gmRD(B)－gm
- A: I haven't heard from Sarah for months. How's she doing? B: Don't you know_____
- The restaurant_________ used to be famous for its steakbelonged to Mr. Wang. However, it was clo
- Allen knows how to use the washing machine._________ .(A) So can Sally. (B) Neither can Sally.(C)
- 對單晶片 8051/52 而言，執行下列哪些指令需要兩個機器週期？(A)RET(B)RLC(C)JNZ(D)POP。
- 關於 RS-232C 與 GPIB 通訊電路的敘述，下列何者正確？(A)GPIB 以並列方式輸出(B)RS-232C 的傳輸距離比 GPIB 短(C)RS-232C 以串列方式輸出(D)RS-
- May: Hello.Jane: Mom, I’ll be home late tonight.May: Is this Jane ? This is May.Jane: Oh, Aunt M
- Mike : I heard there are many monkeys in this mountain. But Ididn’t see any of them last time whe
- There is nothing wrong with Sarah,_________ ?(A) is there (B) isn’t there (C) is she (D) isn’t s
- Paula felt ______ because she felt someone ______ her bodyin the dark.(A) angry ; touched (B) an
- Peggy told me she could open the door without keys. She_________ kidding.(A) can be (B) had bett
- ( )鄭雲到位於附圖中甲處的歐洲國家旅遊，欣賞該國的美景，請問他在該國看不到下列哪一景色？(A)峽灣地形 (B)石灰岩地形 (C)谷灣式海岸 (D)藍白色調的海灣風情。
- I have two sisters and no brothers. _________ of them lovemovies. They go to a movie together ev
- 二、克漏字選擇Where do you want to go on your next vacation :sailing to Hawaii, shopping in Japan, or mount
- A: ______ have a lot of snow in North America in December.B: Really ? It must be very cold there
- Tina noticed her dolls _______ and hung in the yard.(A) cleaned (B) cleaning (C) to clean (D) was
- Tom felt shocked when he heard me _______ at the stranger.(A) to shout (B) shout (C) shouted (D)
- 【題組】(A) they have never been to (B) they had never been to(C) they have never been (D) they had
- 【題組】(A) Whether (B) If (C) Since (D) Before
- 【題組】(A) such as (B) as long as (C) as soon as (D) just like
- 【題組】(A) is (B) was (C) had been (D) been
- 【題組】(A) cost for (B) take to (C) spent on (D) pay for
- 鍇寧利用頻率為 50Hz 的打點計時器對物體落下的過程做紀錄，部分紀錄如下圖所示。若根據表中的數據推算，則下列敘述何者錯誤？(A) 物體的加速度為 20cm/s2 (B)點 3 到點 4 平均速
- 26 如圖所示之電路，其中各電晶體之參數皆為 βnpn = 100，1 kT/q = 1VT = 26 mV 且爾利（Early）電壓 VA = ∞，假定此電路之直流偏壓電流 IC = 4 mA，求此
- 已知邏輯電路如下圖，下列輸出函數何者正確？(A)Y1 (A,B,C )=Σ (0,2,3,5 )(B)Y1 (A,B,C )=Σ (0,3,5 )(C)Y2 (A,B,C )=Σ (5,7 )