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Physics, 26.11.2021 06:00 roseemariehunter12

: Một động cơ máy tời (máy dùng mô tơ để kéo các vật nặng lên cao khi thi công nhà cao tầng) có công suất tiêu thụ bằng 8 kW, hiệu suất 80%. Trục kéo của động cơ có thể kéo một vật có trọng
lượng 800 N chuyển động đều đi lên với vận tốc bằng

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: Một động cơ máy tời (máy dùng mô tơ để kéo các vật nặng lên cao khi thi công nhà cao tầng) có cô...

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