# Physics

Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two rollers are rotating inwardly at the top with the same angular speed. A long uniform board is laid across them in a direction perpendicular to their axes. The board of mass m = 3.52 kg is originally placed so that its center of mass lies a distance x0 = 10 cm from the point midway between the rollers.
The coe�cient of friction between the board and rollers is �k = 0.653. What is the period (s) of the motion?

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1. Why are you posting this twice?

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2. my computer re sent it sorries, i was only trying ot post it once

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