Question

Melissa and David were playing on the tire swing that hangs from the big oak tree in their yard. While Melissa was sitting in the tire hole, David pulled the tire to the side and over his head with his hands and sprinted as fast as he could. His efforts allowed Melissa to swing really high. Beginning with Melissa sitting in the tire swing above David's head, list and explain the energy conversion taking place as she moves.

Answer 1

I think the energy conservation that is taking place is the force between two unbalanced forces pushing and pulling on the tire with the extra force added when David pushed Melissa in the tire... Hope this helps ^-^