The 0.78 kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness of k = 1.62 kN/m. The spring is initially compressed 125mm. 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.
a) Determine the speed of the bob when in position B.
b) Determine the tension in the cord when in position B.
c) Determine the speed of the bob when in the vertical position C (if point C can be reached), and
d) Determine the tension in the cord when in the vertical position C (if point C can be reached).