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A 0.37 kg ball is attached to a 0.71 m long string. The other end of...

A 0.37 kg ball is attached to a 0.71 m long string. The other end of the string is then attached to the ceiling in order to create a pendulum. It is then drawn back such that the string makes an angle of 50 degrees relative to the ceiling and then released from rest. How fast is the pendulum traveling when the string makes an angle of 20 degrees relative to the vertical

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