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Two blocks m and M are connected by a light string passing over a smooth pulley When set free m moves up by 1.4 m in 2s. The ratio `m/M` is (g=10 m`s^(-2)`)
A. |
`13/15` |
B. |
`5/13` |
C. |
`93/107` |
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D. |
`7/9` |