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A thin uniform rod of mass m moves translationary with acceleration a due to two antiparallel forces of lever arm l. One force is of magnitude F and acts at one extreme end. The length of the rod is
A. |
`(mal)/(Ma+F)` |
B. |
`(2(F+ma)l)/(Ma)` |
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C. |
`l(l+F/(ma))` |
D. |
`((F+ma)l)/(2ma)` |