Physics
Physics, 18.06.2021 15:30, Alinakohshsb

Cho cơ hệ như hình vẽ, vật có khối lượng m= 10 kg được treo vào dây nhẹ, không dãn, vắt qua ròng rọc dạng đĩa tròn, khối lượng M= 2 kg . Tác dụng lực F= 122 N vào đầu dây còn lại để kéo vật lên, bỏ qua ma sát cản lăn ở trục ròng rọc, lấy 2 g 10m / s  . a) Phân tích lực. b) Tìm biểu thức gia tốc tịnh tiến của vật theo m, M, F, g. c) Tìm biểu thức lực căng dây treo của vật theo m, M, F, g. d) Tính gia tốc tịnh tiến của vật và lực căng dây treo vật. e) Biết dây kéo hợp với phương thẳng đứng góc 15o . Tính áp lực mà trục ròng rọc phải chịu.

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Cho cơ hệ như hình vẽ, vật có khối lượng m= 10 kg được treo vào dây nhẹ, không dãn, vắt qua ròng rọc...

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