Physics, 28.08.2021 14:00 kayleahrayne
vật có khối lượng 5kg chịu tác dụng của lực kéo F=14N, hệ số ma sát giữa vật và mặt sàn nằm ngang 0,2, góc alpha=30, g=10m/s2. hợp lực tác dụng vào vật có độ lớn là
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vật có khối lượng 5kg chịu tác dụng của lực kéo F=14N, hệ số ma sát giữa vật và mặt sàn nằm ngang 0,...
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