Let X (capital x) = (m1x1 + m2x2)/(m1 + m2). Calculate d2X/dt2, and simplify your expression as much as possible.
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Let X (capital x) = (m1x1 + m2x2)/(m1 + m2). Calculate d2X/dt2, and simplify your expression as much as possible. (If you wish, just call the spring force on x1, F1, and the spring force on x2, F2. You may use other notation as well.) Show your work.
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