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 was not seen that woman’s place was in the home until she began to go out of it; the statement was a reply to an unspoken challenge, it was attempted resistance to irresistible change.”
—Rose Wilder Lane (1886–1965)
“Taking men into the union is just the kindergarten of their education and every force is against their further education. Men who live up those lonely creeks have only the mine owners’ Y.M.C.As, the mine owners’ preachers and teachers, the mine owners’ doctors and newspapers to look to for their ideas. So they don’t get many.”
—Mother Jones (1830–1930)