1. Two boxes are connected by a string, as shown below. The string and pulley are massless, and m1+m2=16 kg. If the system is at rest and the coefficient of static friction is 0.6, what is the minimum weight of m1? (A) 4 kg (B) 6 kg (C) 8 kg (D) 10 kg (E) 12 kg

1. Two boxes are connected by a string, as shown below. The string and pulley are massless, and m₁+m₂=16 kg. If the system is at rest and the coefficient of static friction is 0.6, what is the minimum weight of m₁?
(A) 4 kg
(B) 6 kg
(C) 8 kg
(D) 10 kg
(E) 12 kg

答案：登入後查看
統計： A(0), B(3), C(1), D(33), E(0) #2336701

詳解 (共 1 筆)

艾爾

B1 · 2021/05/03

#4693959

(16-m1)g=0.6m1g

m1=10kg

19. 有一員工考績資料表，表單名稱為「員工考績」包含有下列兩個屬性：「姓名」、「考績」，其中考績分為五個等第，”優”>”甲”>”乙”>”丙”>”丁”，如要列出考績”丙”以下(含”丙”)的所有員工姓名，應該使用下列哪一個 SQL敘述？ (A)Choose 姓名 from 員工考績 where 考績 < ”乙” (B)Select 姓名 from 員工考績 where 考績=”丙” OR 考績=”丁” (C)Select 姓名 from 員工考績 when 考績 < ”乙” (D)Choose 姓名 from 員工考績 when 考績=”丙” OR 考績=”丁”

1. Two boxes are connected by a string, as shown below. The string and pulley are massless, and m1+m2=16 kg. If the system is at rest and the coefficient of static friction is 0.6, what is the minimum weight of m1? (A) 4 kg (B) 6 kg (C) 8 kg (D) 10 kg (E) 12 kg

詳解 (共 1 筆)

其他試題

1. Two boxes are connected by a string, as shown below. The string and pulley are massless, and m₁+m₂=16 kg. If the system is at rest and the coefficient of static friction is 0.6, what is the minimum weight of m₁?
(A) 4 kg
(B) 6 kg
(C) 8 kg
(D) 10 kg
(E) 12 kg