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Physics, 04.09.2021 14:00 keving4three
sau 20s đoàn tàu giảm tốc độ từ 72km/h xuống còn 36m/h sau đó chuyển động đều trong thời gian 30s . Cuối cùng chuyển động chậm dần đều và đi thêm được 40m nữa thì dừng lại
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sau 20s đoàn tàu giảm tốc độ từ 72km/h xuống còn 36m/h sau đó chuyển động đều trong thời gian 30s ....
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