the 0.5lb ball is shot from the spring device shown. Determine the

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the 0.5lb ball is shot from the spring device shown. Determine the smallest stiffness k which is required to shoot the ball a maximum distance s=30in up the plane after the spring is pushed back 3in and the ball is released from rest. the four cords C and plate P keep the spring compressed 2in when no load is on the plate.

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