Matching Pairs Work and EnergyOnline version vocabulary exercise for work and energy by Monica Watkins 1 Work 2 Efficiency 3 Mechanical energy 4 Law of conservation of energy 5 Potential energy 6 Gravitational potential energy 7 Mechanical advantage 8 Kinetic energy 9 Simple machine 10 Power 11 Compound machine 12 Energy states that energy cannot be created or destroyed a machine that does work with only one movement of the machine the rate at which energy is converted is the ratio of output work to input work energy that is due to the gravitational forces between objects a combination of two or more simple machines the sum of the kinetic energy and potential energy of the objects in a system energy due to motion the ratio of the output force to input force the ability to cause change force applied through a distance energy that is stored due to the interactions between objects