In this problem we assume that the solids aluminum (al, 27 g/mole) and copper (cu, 63.5 g/mole) are well described by the model in which each atom is like a classical mass-on-a-spring that can oscillate in three dimensions, obeying classical equipartition for the kinetic and potential thermal energies. we ignore the effects of any small volume changes.

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy