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Work and energy. The work W done by a constant force of magnitude F on a point that moves a displacement s in a straight line in the direction of the force is the product. For example, if a force of 10 newtons (F = 10 N) acts along a point that travels 2 metres (s = 2 m), then W = Fs = (10 N) (2 m) = 20 J.
23 Σεπ 2024 · 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.
What is Work? In physics, “work” is a measure of the energy transferred to or from an object using a force acting on the object as it moves through a distance. It’s important to understand that work is only done when a force causes displacement or movement in the direction of the force applied.
The scientific definition of work reveals its relationship to energy—whenever work is done, energy is transferred. For work, in the scientific sense, to be done, a force must be exerted and there must be motion or displacement in the direction of the force.
Represent the work done by any force. Evaluate the work done for various forces. In physics, work represents a type of energy. Work is done when a force acts on something that undergoes a displacement from one position to another.
Work is done whenever a force or a component of a force results in a displacement. No component of the force is acting in the direction of motion when the book is moved horizontally with a constant velocity. The force and the displacement are independent. No work is done by the hand on the book.
When a force acts upon an object while it is moving, work is said to have been done upon the object by that force. Work can be positive work if the force is in the direction of the motion and negative work if it is directed against the motion of the object.
