Physics, 28.09.2021 01:40 brandiwingard

Một vật chuyển động thẳng đều trên quãng đường AB . Vật đi nửa đoạn đường đầu với vận tốc 20m/s , nửa đoạn đường sau đi với vận tốc 5m/s . Tính vận tốc trung bình trên cả quãng đường là

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Một vật chuyển động thẳng đều trên quãng đường AB . Vật đi nửa đoạn đường đầu với vận tốc 20m/s , nử...