An empty office chair is at rest on a floor. Consider the following forces:. . I. a downward force of gravity.. . II. an upward force exerted by the floor.. . III

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Câu hỏi

🗣️ Nguyễn Thị Phước hỏi: Cho mình hỏi một câu Force Concept Inventory (FCI) - English bài tập về nhà

An empty office chair is at rest on a floor. Consider the following forces:

I. a downward force of gravity.

II. an upward force exerted by the floor.

III. a net downward force exerted by the air.

Which of the forces is (are) acting on the office chair?

(A) I only.

(B) I and II.

(C) II and III.

(D) I II, and III.

(E) none of the forces. (Since the chair is at rest, there are no forces acting upon it.)

👩 Đánh giá của giáo viên: Câu này trung bình, mức độ hiểu.

🔑 Chủ đề: trac nghiem.

Câu trả lời hay nhất

🕵 Bạn Phan Thị Tâm trả lời:

Chọn câu (B): I and II.

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Câu trước | Câu kế tiếp
Các câu trả lời

👤 Nguyễn Thị Minh viết:

Chọn C, II and III.

👤 Trần Văn Phúc viết:

Chọn D, I II, and III.

👤 Lê Văn Anh viết:

Chọn E, none of the forces. (Since the chair is at rest, there are no forces acting upon it.)

👤 Trần Thị Anh viết:

Chọn B, I and II.

➥ 🗣️ Nguyễn Thị Phước trả lời: Cảm ơn bạn, câu này hình như có trong file doc này Đề của VLTT-03 (Khó và Hay)

👤 Nguyễn Thị Phúc viết:

Chọn A, I only.

👤 Trần Văn Đức viết:

Chọn B: I and II.

Gửi bạn các file hữu ích đi kèm câu hỏi:

Sách Bộ Đề Minh Họa Luyện Thi THPT Quốc Gia Môn Toán
Sách Bộ Đề Minh Họa Luyện Thi THPT Quốc Gia Môn Toán
Sách Bồi Dưỡng Học Sinh Giỏi Môn Lịch Sử THPT (ĐN)
Sách Bồi Dưỡng Học Sinh Giỏi Môn Lịch Sử THPT (ĐN)

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