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A simple pendulum is made from a 0.652-m-long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?M ultipl eConcept Example 6 reviews the principles that play a role in this problem. A bungee jumper, whose mass is 77 kg,jumps from a tall building. After reaching his lowest point, he continues to oscillate up and down, reaching the lowr point two more times in 6.1 s. Ignoring air resistance and assuming that the bungee cord is an ideal spring, determine its spring constant