Physics, 24.07.2021 01:10 phancharamachasm
Khẩu súng khối lượng 4kg bắn đi một viên đạn theo phương ngang có khối lượng 50 gam với vận tốc 60m/s coi như lúc đầu hệ súng và đạn đứng yên tốc độ giật lùi của súng là
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Khẩu súng khối lượng 4kg bắn đi một viên đạn theo phương ngang có khối lượng 50 gam với vận tốc 60m/...
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