When s = 0, the spring on the firing mechanism is unstretched. If the arm is pulled back such that s = 100 mm and released, determine the speed of the 0.3-kg ball and the normal reaction of the circular track on the ball when θ = 60°. Assume all surfaces of contact to be smooth. Neglect the mass of the spring and the size of the ball.

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k = 1500 N/m 1.5 m