In an ideal experiment, an elastic ball is let go from a certain height, then the ball hits the ground and bounces back to the same height it was released; then the motion repeats, each time the ball bounces back to the initial height. From what height was the ball released if 1.35s lapse between consecutive bounces? Consider g = 9.80 m/s2.

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Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.