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Physics, 09.11.2021 23:20 feliciagraham14

Một trụrỗng có khối lượng 50 kg, đường kính 1m, đang quay vớivận tốc800 vòng một phút. Tác dụng vào trụmột lực hãm tiếp tuyến với mặt trụvà vuông góc với trục quay. Sau 2 phút 37 giây, trụdừng lại. Tìm:a –Mômen hãmb –Lực hãm tiếp tuyến

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Một trụrỗng có khối lượng 50 kg, đường kính 1m, đang quay vớivận tốc800 vòng một phút. Tác dụng vào...

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