The figure depicts a hockey puck sliding with constant speed v0 in a straight line from point P to point Q on a frictionless horizontal surface. Forces

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Câu hỏi

🗣️ Lê Trí Hải hỏi: Cho mình hỏi một câu Force Concept Inventory (FCI) - English bài tập về nhà

The figure depicts a hockey puck sliding with constant speed v0 in a straight line from point P to point Q on a frictionless horizontal surface. Forces exerted by the air are negligible. You are looking down on the puck. When the puck reaches point Q, it receives a swift horizontal kick in the direction of the heavy print arrow. Had the puck been at rest at point P, then the kick would have set the puck in horizontal motion with a speed vk in the direction of the kick.

8-11

The speed of the puck just after it receives the kick is

(A) equal to the speed v0 it had before it received the kick.

(B) equal to the speed vk resulting from the kick and independent of the speed v0.

(C) equal to the arithmetic sum of the speeds v0 and vk.

(D) smaller than either of the speeds v0 or vk.

(E) greater than either of the speeds v0 or vk, but less than the arithmetic sum of these two speeds.

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

🔑 Chủ đề: trac nghiem.

Câu trả lời hay nhất

🕵 Bạn Trần Văn Dũng trả lời:

Chọn câu (E): greater than either of the speeds v0 or vk, but less than the arithmetic sum of these two speeds.

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

👤 Trần Thị Dũng viết:

Chọn C, equal to the arithmetic sum of the speeds v0 and vk.

👤 Nguyễn Thị Lộc viết:

Chọn D, smaller than either of the speeds v0 or vk.

👤 Trần Thị Khánh viết:

Chọn E, greater than either of the speeds v0 or vk, but less than the arithmetic sum of these two speeds.

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

👤 Nguyễn Thị Đức viết:

Chọn B, equal to the speed vk resulting from the kick and independent of the speed v0.

👤 Đinh Thị Thành viết:

Chọn A, equal to the speed v0 it had before it received the kick.

👤 Nguyễn Thị Minh viết:

Chọn E: greater than either of the speeds v0 or vk, but less than the arithmetic sum of these two speeds.

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