In material science, a power is any collaboration that, when unopposed, will change the movement of an article. A power can make an item with mass change its speed (which incorporates to start moving from a condition of rest), i.e., to quicken. Power can likewise be depicted naturally as a push or a draw. A power has both greatness and course, making it a vector amount. It is estimated in the SI unit of newtons and spoke to by the image F.

The first type of Newton's subsequent law expresses that the net power following up on an article is equivalent to the rate at which its force changes with time. In the event that the mass of the article is steady, this law infers that the quickening of an item is legitimately relative to the net power following up on the item, is toward the net power, and is contrarily corresponding to the mass of the article.

Ideas identified with power include: push, which expands the speed of an article; drag, which diminishes the speed of an item; and torque, which produces changes in rotational speed of an article. In an all-inclusive body, each part for the most part applies powers on the neighboring parts; the dissemination of such powers through the body is the inside mechanical pressure. Such interior mechanical burdens cause no increasing speed of that body as the powers balance each other. Weight, the dispersion of numerous little powers applied over a territory of a body, is a straightforward kind of stress that whenever lopsided can make the body quicken. Stress for the most part causes distortion of strong materials, or stream in liquids.