17-81. Determine the angular acceleration of the 25-kg diving board and the horizontal and vertical components of reaction at the pin A the instant the man jumps off. Assume that the board is uniform and rigid, and that at the instant he jumps off the spring is compressed a maximum amount of 200 mm, w = 0, and the board is horizontal. Take k = 7 kN/m. E1.5 m -1.5 m -

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