Main Page | See live article | Alphabetical index In physics, resistance force is the force which an effort force must overcome in order to do work on an object. Resistance force is a component in the following equation, R × DR = E × DE where R equals resistance force, DR equals resistance distance, E equals effort force, and DE equals effort distance. Resistance force is also a component in the following equation, Work output = R × DR where R equals resistance force and DR equals resistance distance. Resistance force, like most other forces, is measured in the U.S. customary unit, the pound, or the Metric unit, the newton. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.