How it works
Balance moments about the pivot: effort force × effort arm = load force × load arm. Arms are perpendicular distances from the pivot to each force line.
Input definitions
- Load force (N)
- Enter the value in the labeled unit.
- Load moment arm (m)
- Enter the value in the labeled unit.
- Effort moment arm (m)
- Enter the value in the labeled unit.
A worked example
- Load force (N)
- 100
- Load moment arm (m)
- 1
- Effort moment arm (m)
- 2
Assumptions & limits
Use consistent stated units. Ideal geometric or physical model; verify dimensions and applicability before real-world design.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Which distance is the moment arm?
The perpendicular distance from the pivot to the line of action of the force. It is not always the full length of the lever.
How does Ideal lever effort force work?
Balance moments about the pivot: effort force × effort arm = load force × load arm. Arms are perpendicular distances from the pivot to each force line.
What are the limits of Ideal lever effort force?
Use consistent stated units. Ideal geometric or physical model; verify dimensions and applicability before real-world design.