Kaplan Nursing Entrance Practice Exam

In physics, work is said to be done when:

1. Force acts on an object without movement

2. An object moves in the direction of the applied force

3. Acceleration is applied to an object

4. Energy is stored in a system

The correct answer is: An object moves in the direction of the applied force

In physics, the concept of work is defined through the interaction between force and movement. Work is accomplished only when a force is applied to an object and there is a displacement of that object in the direction of the force. This means that for work to be considered done, the force must not only be present, but it must also actually cause the object to move. Therefore, when an object moves in the direction of the applied force, it indicates that energy is being transferred to the object, allowing it to perform a task or change its state. This leads to a consideration of both the magnitude of the force and the distance over which it is applied. The formula for work is expressed as the product of the force and the distance over which it acts, taking into account the angle between the force and the direction of movement. While other options present ideas related to work and force, they do not appropriately align with the definition of work in the context of physics. For example, if force acts on an object without movement, no work is done since there is no displacement. Similarly, applying acceleration to an object does not necessarily mean work is being done unless the object moves as a result. Lastly, the storage of energy in a system does not equate to