AMBIENT

Phải tác dụng vào đầu bên trái một lực bao nhiêu để giữ cho thanh thăng bằng ?

bởi Phan Thị Trinh 08/11/2018

Một trạm thu phí có một thanh chắn dài 12m có khối lượng 180kg và có trọng tâm ở cách đầu 5m. Hỏi phải tác dụng vào đầu bên trái một lực bao nhiêu để giữ cho thanh thăng bằng

Giúp mình nha đang cần gấp lắm Thank you

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    bởi phạm kiều khanh 08/11/2018
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