The 0.75-kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness of k = 6 kN/m and is compressed 125 mm. Determine the speed of the bob and the tension in the cord when the bob is at positions B and C. Point B is located on the path where the radius of curvature is still 0.6 m, i.e., just before the cord becomes horizontal.

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B 0.6 m A -0.6 m- k C 1.2 m