Lever Classes
This interactive simulator explores Lever Classes in Classical Mechanics. 1st / 2nd / 3rd class: arms, τ about fulcrum, MA vs Torque & Balance. Use the controls to change the scenario; watch the visualization and any graphs or readouts to connect the model with lectures, labs, and homework.
Who it's for: Suited to beginners and first exposure to the topic. Typical context: Classical Mechanics.
Key terms
- lever
- classes
- lever classes
- mechanics
- classical
How it works
Levers are classified by where the fulcrum sits relative to the load and the effort. This lab fixes a horizontal rigid bar, takes torques about the fulcrum, and uses the usual sign: counterclockwise positive in the view. Class 1 (seesaw): both weights pull down on opposite sides of the pivot. Class 2 (wheelbarrow model): the load hangs between pivot and the point where you apply an upward effort; the ideal mechanical advantage d_eff/d_load can exceed 1. Class 3 (tongs / forearm model): you apply effort between pivot and load; equilibrium requires |F_eff| > W_load, trading force for motion range. Compare with Torque & Balance, which is a general beam with a movable pivot but not this ABC classification.
Key equations
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