問題詳情
47.如【圖 47】所示，重 80 N 的物體放置於水平面上，物體與水平面的摩擦係數為 μs=0.μk=0.5，若 F=150 N，請求其摩擦力約為多少 N？ 
(A) 56
(B) 77.5
(C) 108.5
(D) 129.9
參考答案
答案：B
難度：簡單0.8
書單：沒有書單，新增
內容推薦
- 有關應力-應變圖之敘述，下列何者錯誤？(A)在彈性極限內應力與應變成正比 (B)超過降服點，材料將產生塑性變形(C)應變硬化區間時，負荷增大後會繼續變形，但應力與應變間已無線性關係(D)頸縮現象
- 有一斷面寬及高為 6 cm x 10 cm 的樑，倘若此斷面受 100 N 的剪力，請問中立軸上方 1 cm 處的剪應力大小為多少 MPa？(A) 4*10-2 (B) 6*10-2 (
- 有一斷面寬及高為 8 cm x 12 cm 的樑，倘若此斷面受 300N-m 的彎矩，請問中立軸上方 3 cm 處的彎曲應力大小為多少 MPa？(A) 0.78125 (B) 171875
- 當樑的斷面形狀與尺寸皆固定時，有關危險斷面之敘述，下列何者正確？(A)可以單獨由剪力圖中觀察出來 (B)可以單獨由彎矩圖中觀察出來(C)剪力與彎矩圖需同時使用才可得知 (D)無法從剪力與彎矩圖得
- 有一長 6 m 的簡支樑，樑上受 200 N/m 的均佈荷重，請求樑中點之彎矩值是多少 N-m？(A) 0 (B) 600 (C) 900 (D) 1800
- 有一厚 2 cm、抗剪強度為 1 MPa 的鋼板，若要在此板上衝出一大小為 1 cm x 5 cm 的方孔，則須施加的力量為多少 N？(A) 300 (B) 400 (C) 600 (D)
- 有一圓棒直徑為 10 mm、長 100 cm，受軸向力作用後伸長 0.5 cm，直徑變為 98 mm，其蒲松比(poisonratio)為多少？(A) 0.002 (B) 0.005 (C)
- 有一直徑為 10 mm 的圓桿，承受 47100 N 的拉力作用，則此圓桿承受的拉應力為多少 MPa？(A) 471 (B) 600 (C) 47100 (D) 60000
- 有底邊寬為 b、側邊高為 h 之矩形，請問對其垂直側邊的慣性矩為何？(A) bh3/12 (B) bh3/3 (C) b3h /12 (D) b3h /3
- 某一面積為 100cm2 的平面對其形心軸的慣性矩為 1500 cm4，若此平面對 S 軸的慣性矩為 4000 cm4，請問 S 軸至平面形心軸的距離為多少 cm？(A) 3 (B) 4 (C)
內容推薦
- 如【圖 49】所示，請求該面積對其水平形心軸之慣性矩？ (A) 75(B) 25(C) 243(D) 25
- 一斷面為 12cm x 12cm 的外伸樑，同時承受一張力 600N 與一向上彎矩 36N-m，請問此外伸樑斷面底邊所受的應力為多少 N/cm2？(A) -33 (B) 17 (C) 1
- 機關欲檢查其電子招標上傳之標案是否成功，招標機關必須於檢查過程中提供下列哪一種檔案，方可進行檢查作業： (A)招標上傳之電子憑據檔(.tkn)。 (B)招標上傳之結構檔(.str)。 (C)安全
- 下列敘述，何者錯誤？ (A)機關辦理評選，得於招標文件規定過半數出席評選委員評定總分未達若干分者，為不合格廠商。 (B)機關得於招標文件載明預算未完成立法程序前，得先辦理保留決標，俟預算通過後始
- 依採購法規定，機關得允許廠商於開標前補正非契約必要之點之文件。但應於招標文件中預為明定。(A)O(B)X
- Many major news stations have been _____ the presidential debates live on the evening news.(A) te
- _____ from working overtime for three days, Justin slept for almost twelve hours.(A) Lingered (B)
- Due to global warming, many natural disasters have become more _____ and have resulted in moredam
- Forgetting to have his coat with him, the man _____ in the heavy snow while waiting for the bus.(
- The parcel was mailed last Monday. It _____ arrived last week, but we haven’t received it until n
- The airline tickets are non-exchangeable; they cannot be _____ for cash, but you may be able to a
- Kevin had to work extra hours in order to pay the monthly_____ for his new car.(A) belongings (B)
- You _____ clean your teeth twice a day to avoid tooth cavity or other problems.(A) rather (B) do
- The company says the package was mailed two weeks ago but it _____ hasn’t arrived.(A) yet (B) st
- My daughter loves curry as much as her father _____.(A) is (B) will (C) do (D) does
- _____ the disease is highly contagious, the government has advised the public to take cautions t
- The principal _____ with Tim’s parents for more than half an hour. Tim is now feeling very worri
- Before John left for Germany, he said he would stay in contact, but he _____ called _____ wrote.
- As iron sharpens iron, so one person sharpens _____. From the saying, we know friends should sha
- 三、克漏字測驗【請依照段落上下文意，選出最適當的答案】 The sun is a huge, fiery globe of gas. Every now and then, it sends
- 【題組】(A) serving as (B) checking out (C) reporting to (D) resulting in
- 【題組】(A) regional (B) seasonal (C) universal (D) normal
- 【題組】(A) to depend (B) depend (C) depending (D) dependent
- 【題組】(A) harm (B) wonders (C) justice (D) favors
- 四、閱讀測驗 If you’ve ever tried famous Taiwanese dishes Gua bao (刈包), aka the Taiwanese hamburger, a