In physics, resistance force is the force which an effort force must overcome in order to do work on an object via a simple machine. Resistance force, like most other forces, is measured in newtons or in pounds-force.
For an ideal (frictionless) mechanism in which no energy is lost, resistance force obeys the relation:
where:
- R equals resistance force
- DR equals resistance distance
- E equals effort force
- DE equals effort distance
Resistance force is used to calculate the work output using the following equation:
Famous quotes containing the words resistance and/or force:
“It is not the first duty of the novelist to provide blueprints for insurrection, or uplifting tales of successful resistance for the benefit of the opposition. The naming of what is there is what is important.”
—Ian McEwan (b. 1938)
“Not even New Hampshire farms are much for sale.
The farm I made my home on in the mountains
I had to take by force rather than buy.”
—Robert Frost (1874–1963)