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A bowling ball weighing 71.2 is attached to the ceiling by a 3.90 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, the speed of the bowling ball is measured at 4.20 .

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    Please complete the question. What is required?

    Also the quantities do not indicate units, so it is not clear if the quantities are in consistent units.

    If they are in consistent units, the ball had been pulled aside to 13.34° with the vertical.

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