Question: A small block B fits inside a slot cut in arm OA which rotates in a vertical plane at a constant rate. The block remains

A small block B fits inside a slot cut in arm OA which rotates in a vertical plane at a constant rate. The block remains in contact with the end of the slot closest to A and its speed is 4.2 ft/s for 0 ?? θ ?? 150?. Knowing that the block begins to slide when θ =150?, determine the coefficient of static friction between the block and the slot.

1ft B A

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