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Physics, 26.10.2021 01:20 frankierice020

Bài 9: Người anh cao 1,7m, người em cao 1,5m cùng nhau di chuyển thùng hàng cao 1m bằng cách kéo hoặc đẩy thùng hàng trên sàn ngang, cho rằng hệ số ma sát giữa thùng hàng và sàn không đổi. Giả sử 2 anh em tác
dụng lực như nhau trong mọi trường hợp. Trường hợp nào thùng hàng sẽ di chuyển thuận lợi hơn? Chứng minh.
a. Anh kéo, em đẩy.
b. Anh đẩy, em kéo.
c. Anh và em cùng kéo.
d. Anh và em cùng đẩy.

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Answers: 2

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Bài 9: Người anh cao 1,7m, người em cao 1,5m cùng nhau di chuyển thùng hàng cao 1m bằng cách kéo hoặ...

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