Physics, 21.10.2021 14:00 briarkaltvedt

cho một máng nghiêng lấy 1 viên bi lăn nhanh dần điều từ đỉnh 1 máng với không vận tốc ban đầu , bỏ qua ma sát giữa vật và máng , biết viên bi lăn với gia tốc 1m/s biết vận tốc khi chạm đất là 4m/s . tính chiều dài máng và thời gian viên bi chạm đất

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cho một máng nghiêng lấy 1 viên bi lăn nhanh dần điều từ đỉnh 1 máng với không vận tốc ban đầu , bỏ...

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