Question

If A person wants to swing in a swing for A long time . Then which of the following conditions should be applied - 1. The rope should be long. 2. The rope should be short. 3. There should be more weight at the person's back. 4. There should be less weight at the person's back.
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Answer 1

Answer:

it requires 1 also and 4 also so that the person swing for a long time