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Miu2512
2 năm trước
Câu 1: Phát biểu định luật bảo toàn động lượng và viết phương trình cho trường hợp hệ hai vật. Áp dụng : Trong bóng đá, khi người thủ môn bắt một quả bóng sút rất căng, người đó phải làm động tác kéo dài thời gian bóng chạm tay mình ( như thu bóng vào bụng). Tại sao thủ môn lại làm vậy?
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