Question: An 80-cm-long pendulum with a 0.6-kg bob is released from rest at initial angle 0 with the vertical. At the bottom of the swing, the

An 80-cm-long pendulum with a 0.6-kg bob is released from rest at initial angle θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s.

(a) What was the initial angle of the pendulum?

(b) What angle does the pendulum make with the vertical when the speed of the bob is 1.4 m/s?

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