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Physics, 20.09.2021 07:20 masonorourke

Một vận động viên chạy trên một đoạn đường thẳng từ A đến B với AB = 100m mất thời gian 20s. Sau đó vận động viên này đi bộ ngược lại đến C với BC = 20m mất 10s. Chọn trục Ox trùng AB, chiều
dương từ A đến B. Tính tốc độ và vận tốc trung bình của vận động viên này
a. Trong 20s đầu.
b. Trong suốt thời gian 30s.

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Một vận động viên chạy trên một đoạn đường thẳng từ A đến B với AB = 100m mất thời gian 20s. Sau đ...

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