A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy’s hand but before it touches the ground, and assume

TẢI VỀ (.doc)
Để download Câu trắc nghiệm này dạng file WORDS (.doc) các bạn click vào nút TẢI VỀ bên trên.

Câu hỏi

🗣️ Huỳnh Nhật Thắng hỏi: Cho mình hỏi một câu Force Concept Inventory (FCI) - English bài tập về nhà

A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy’s hand but before it touches the ground, and assume that forces exerted by the air are negligible. For these conditions, the force(s) acting on the ball is (are):

(A) a downward force of gravity along with a steadily decreasing upward force.

(B) a steadily decreasing upward force from the moment if leaves the boy’s hand until it reaches its highest point; on the way down, there is a steadily increasing downward force of gravity as the ball gets closer to the Earth.

(C) an almost constant downward force of gravity along with an upward force that steadily decreases until the ball reaches its highest point; on the way down there is only an almost constant downward force of gravity.

(D) an almost constant downward force of gravity only.

(E) none of the above. The ball falls back to the ground because of its natural tendency to rest on the surface of the Earth.

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

🔑 Chủ đề: trac nghiem.

Câu trả lời hay nhất

🕵 Bạn Trần Hải Lộc trả lời:

Chọn câu (D): an almost constant downward force of gravity only.

Chỉa sẻ
Câu trước | Câu kế tiếp
Các câu trả lời

👤 Trần Anh Ân viết:

Chọn C, an almost constant downward force of gravity along with an upward force that steadily decreases until the ball reaches its highest point; on the way down there is only an almost constant downward force of gravity.

👤 Nguyễn Minh Thuận viết:

Chọn D, an almost constant downward force of gravity only.

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

👤 Trần Khánh Bình viết:

Chọn E, none of the above. The ball falls back to the ground because of its natural tendency to rest on the surface of the Earth.

👤 Nguyễn Văn Toàn viết:

Chọn B, a steadily decreasing upward force from the moment if leaves the boy’s hand until it reaches its highest point; on the way down, there is a steadily increasing downward force of gravity as the ball gets closer to the Earth.

👤 Trần Văn Vũ viết:

Chọn A, a downward force of gravity along with a steadily decreasing upward force.

👤 Phạm Khôi Hoàng viết:

Chọn D: an almost constant downward force of gravity only.

Gửi bạn các file hữu ích đi kèm câu hỏi:

Sách Hình Dán Thông Minh Giúp Bé Làm Quen Với Toán Học Vũ Điệu Thiên Nga
Sách Hình Dán Thông Minh Giúp Bé Làm Quen Với Toán Học Vũ Điệu Thiên Nga
Sách 50 đề minh họa 2024 môn Toán học
Sách 50 đề minh họa 2024 môn Toán học

Làm thêm Force Concept Inventory (FCI) - English

Two metal balls are the same size but one weights twice as much as the other. The balls are dropped from the roof of a single story building at the same
Two metal balls are the same size but one weights twice as much as the other. The balls are dropped from the roof of a single story building at the same
As the spaceship moves from point Q to point R along the path you have chosen in question 21, its speed is
As the spaceship moves from point Q to point R along the path you have chosen in question 21, its speed is
In the following figure, student A has a mass of 75 kg and student B has a mass of 57 kg. They sit on identical office chairs facing each other. Student
In the following figure, student A has a mass of 75 kg and student B has a mass of 57 kg. They sit on identical office chairs facing each other. Student
A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy’s hand but before it touches the ground, and assume
A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy’s hand but before it touches the ground, and assume
Use the statement and figure below to answer the next two questions (15 and 16). A large truck breaks down on the road and receives a push back into town
Use the statement and figure below to answer the next two questions (15 and 16). A large truck breaks down on the road and receives a push back into town
After the car reaches the constant cruising speed at which its driver wishes to push the truck,
After the car reaches the constant cruising speed at which its driver wishes to push the truck,