An object of mass 7.21 kg is released from rest and drops 2.05 m to the floor .The collision is completely inelastic .How much kinetic energy is lost during the collision?

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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.