A 4.0 kg box slides on a horizontal frictionless table and collides with a 1.6 kg box initially at rest on the edge of the table, at height h = 1.0 m. The speed of the 4.0 kg box is 3.6 m/s just before the collision. If the two boxes stick together because of packing tape on their sides, what is their kinetic energy just before they strike the floor?

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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.