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Physics, 16.09.2021 15:00 khristaviaaa
Lúc 7h một người đang ở A chuyển động thẳng đều với vân toocs 36km/h đuổi theo người B đang chuyển động thẳng đều với vân tốc 5m/s biết AB dài 18km chọn trục toạ độ trùng với đường chuyển động , chiều dương là chiều chiều động , gốc toạ độ là A , gốc thời gian là 7h . Trả lời các câu hỏi sau ;
a, người A đuổi kịp người B lúc mấy giờ
b, xác định thời điểm 2 người cách nhau 6km
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Lúc 7h một người đang ở A chuyển động thẳng đều với vân toocs 36km/h đuổi theo người B đang chuyển đ...
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