Quick Answer: The Moment of Force Apparatus STEM Lab is a lever arm with a centimetre scale balanced on a knife-edge, on a heavy cast iron stand, used to verify the principle of moments with slotted weights and 2 stainless steel hangers.
Last updated: October 2026
Key Features
Lever arm with engraved metric scale on both sides
Knife-edge support on a steel pillar and heavy cast iron base
2 stainless steel weight hangers with indicators
Set of slotted weights
Central balancing screw for levelling the unloaded arm
Technical Specifications
Specification
Value
Fulcrum stand
Cast iron base, steel vertical pillar, knife-edge support
Lever arm scale
Centimetre scale
Hangers
2, stainless steel, with indicators
Weights
Slotted weight set
About This Product
Students first balance the empty arm level on the knife-edge, then hang a known mass on one side and slide a second hanger along the other until the arm is level again. Multiplying each load by its distance from the pivot shows that anticlockwise and clockwise moments are equal at balance, which leads into torque, levers and static equilibrium.
Frequently Asked Questions
How is the Moment of Force Apparatus STEM Lab balanced before an experiment?
The lever is set on the knife-edge with no weights and the central balancing screw is adjusted until the arm rests horizontal.
