No work, as understood in this context, is done unless the object is displaced in some way and there is a component of the force along the path over which the object is moved. Work done on a body is accomplished not only by a displacement of the body as a whole from one place to another but also, for example, by compressing a gas, by rotating a shaft, and even by causing invisible motions of the particles within a body by an external magnetic force. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ. To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is constant, work may be computed by multiplying the length of the path by the component of the force acting along the path. Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.
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