1) This document discusses work, power, and energy. It defines work as the product of force and displacement, and defines the units of work as newton-meters (Nm) or joules (J). 2) Power is defined as the rate of doing work, or the ratio of work to time. The units of power are watts (W). 3) Energy exists in various forms including mechanical, thermal, chemical, light, sound, nuclear, and electrical. Mechanical energy includes potential energy, which depends on position or height, and kinetic energy, which depends on motion or velocity. 4) The work-energy principle states that the work done on an object equals its change in