Work is defined as what?

• A. The rate at which energy is transferred
• B. A measurement of force used to produce movement
• C. The energy stored in a system
• D. The resistance of a material to deformation

Answer: (B)

Work is energy transferred when a force acts on a body and moves it through a distance in the direction of that force. The amount of work depends on both the force applied and how far the object moves under that force (W = F × d, in the direction of the force). Among the given choices, the one that describes work as tied to a force producing movement best captures this idea: work involves a force causing motion, which leads to energy transfer. The other options describe related but different concepts—power (rate of energy transfer), stored energy (potential energy), and material stiffness (resistance to deformation).