The propeller is released and allowed to unwind. Click to see a 120kb movie.

Assuming the elastic band, fully wound, stores 100 joules of energy, how much elastic potential energy and kinetic energy does the plane have when the rubber band unwinds fully? Assume no air resistance.

Indicate using the slider on the right the amount of elastic potential energy left in the rubber band. Assume no energy loss. Elastic potential

Indicate using the slider on the left, the amount of kinetic energy energy has. Assume no air resistance or friction. Kinetic energy