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Physics 12 Online
OpenStudy (anonymous):

In an amusement park ride, a small child stands against a wall of cylindrical room that is then made to rotate. The floor drops downward and the child remains against the wall. If the radius of the device is 2.15 m and the relevant coefficient of friction between the child and the wall is 0.400, with what minimum speed is the child moving if he is to remain pinned against the wall?

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