A 10 kg block is released from rest at the top of a 40 degree incline that is 4 m long. If the speed of the block at the bottom of the incline is 5 m/s, determine the coefficient of friction between the block and incline. Answer question using conservation of energy and momentum concepts.

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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.