A ball of mass m 1.95 kg is released from rest at a height h= 76.0 cm above a light vertical spring of force constant k as in Figure [a] shown below. The ball strikes the top of the spring and compresses it a distance d 9.20 cm as in Figure [b] shown below. Neglecting any energy losses during the collision, find the following. www (a) Find the speed of the ball just as it touches the spring. m/s (b) Find the force constant of the spring. kN/m

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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.