In physics, "displacement" is defined as the change in position of an object, including how far the object travels and in what direction. If an object moves around but returns to its original position, the object will mo... More » Science Physics defines physics as "the branch of science that is mostly involved with properties of matter, energy and nature." Additionally, Ask lists the main topics explored in physics: mechanics, heat, light, sound, magneti... More » Science Physics

One of the most common definitions for efficiency in physics is a measurement of how much of the desired work or product is obtained from each unit of energy invested into that task or product. An additional definition o... More » Science Physics
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An object is said to have uniform velocity if the direction of motion and the rate at which the object changes its position is constant. In other words, an object with uniform velocity continues to cover the same amount ... More » Science Physics

Because velocity is the rate of motion of an object in a specific direction, either an increase or decrease in the object's speed or a change in its direction of travel causes its velocity to change. This change in veloc... More » Science Physics

Measure the overall change in the position of an object after movement comes to a stop. Distinguish displacement from distance by understanding that traveling a certain distance can leave the object very close to where i... More » Science Physics

In physics, energy is a system's capacity to perform work, which is force acting on an object. Energy has many forms, including kinetic or mechanical energy, potential energy, light energy and heat energy. The basic rule... More » Science Physics