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Physics, 04.11.2021 14:00 cynayapartlow88

Viên đạn có khӕi lượng m =10g đang bay với vận tӕc v = 100m/s thì gặp một bản gỗ. a) Viên đạn cắm sâu vào gỗ dày d = 4cm. Tính lực cản trung bình của gỗ lên đạn.
b) Tìm vận tӕc viên đạn sau khi ra khӓi bản gỗ chỉ dày d = 2cm

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