4. Two playground swings start out together. After 5 complete oscillations, the swings are out of...

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4. Two playground swings start out together. After 5 complete oscillations, the swings are out of step by half a cycle. If the time it takes for one swing to complete 10 oscillations is 2 minutes, what is the difference in the heights of the swings? 5. A pendulum with a swing amplitude of 5° is known to have a period of 5 s. What is the length of the pendulums string?

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