Quick Answer: The Unequal-Arms Scale is a lever balance with arms of different length for demonstrating the law of moments and the equilibrium of a lever. It is supplied with a set of masses for practical work.
Last updated: October 2026
Key Features
Lever with unequal arms on a fulcrum for moment experiments
Supplied with a set of masses
Shows how different masses at different distances from the fulcrum balance
Covers torque, load, effort and mechanical advantage
Technical Specifications
Specification
Value
Principle demonstrated
Law of moments
Supplied with
Set of masses
Application
Lever equilibrium, moment of force, torque and mechanical advantage experiments
About This Product
Students balance the empty scale, hang one mass at a chosen distance from the fulcrum and move a second mass on the other arm until the lever is level again. Recording each mass and distance lets them check that the clockwise moment equals the anticlockwise moment, using moment = force × distance.
Frequently Asked Questions
Does the Unequal-Arms Scale come with masses?
Yes. It is supplied with a set of masses for the experiments.
