Work is done when a force is applied to an object and it causes the object to move in the direction of the force. Mathematically, work is calculated as the force applied multiplied by the distance the object moved in the direction of the force. If there is no movement or if the force is not in the same direction as the movement, then no work is being done.
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No work is being done by the automobile if it is standing still with the engine running since it isn't in motion (not counting any work done by the vibrations transmitted to the air and ground upon which it rests). The engine, on the other hand IS doing work while idling since the parts inside are moving and both having work done on them and, in turn, performing work on other parts.
Yes, when work is done on an object, its energy is typically increased. This increase in energy can manifest as changes in kinetic energy, potential energy, or a combination of both, depending on the nature of the work being done.
Answer #1:YES======================Answer #2:No
The force that allows work to be done is applied force. When an external force is applied to an object, it can overcome resistance and cause the object to move, resulting in work being done on the object. This force is typically in the direction of the displacement of the object.
When a system is doing work, it can either increase or decrease in temperature depending on the type of work being done. If work is done on the system, its temperature may increase due to the input of energy. Conversely, if the system is doing work on its surroundings, it may lose energy and decrease in temperature.