A pulley system is attached securely to the corner of a ceiling and connects to masses...

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LAK ng 四2-23 rn Co 10,65 mshould nok Slipon nm ト5xoan 23 Siw 31 60 1.5メ10 Sin碼-(0.9 x 1 2 T

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A pulley system is attached securely to the corner of a ceiling and connects to masses...

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