A 600 N volleyball player lands from a spike attempt and immediately jumps up to try for a block. When she first contacts the ground, her velocity is 3 m/s downward, and then as she leaves the ground for the block her velocity is 4 m/s upward. What is the average force exerted during this movement if there is a deflection between her shoe and the ground of 0.05 meters. Assume the only change is in kinetic energy.

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A: Given:- weight of shoes = 2.1kg weight of ballet slipers = 1.6kg h= 0.63m speed of shoes = 3 m/s

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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.