Levers, Moments & the Law of the Lever Game
A physics game to master levers: one side of the scale already has weights and you place yours at just the right distance to balance it. Each weight’s moment is weight × distance to the pivot, and the scale balances when the moments on both sides are equal. Exact calculation, round after round, with instant feedback.
Physics · Primary, Secondary, Sixth Form
Internalising that weight × distance must match on both sides is the basis of levers, pulleys and simple machines. The game trains it visually with concrete numbers.
To balance, if your weight is half you must place it twice as far. That inverse reasoning reinforces proportionality, key in maths and physics.
Dividing the moment by your weight to find the exact distance trains division and mental maths towards a clear, motivating goal.
"On the left there are 3 kg at 4 notches (moment 12). With a 4 kg weight, the student computes 12 ÷ 4 = 3 and places it on notch 3 to balance."
Prefer to learn without screens? Try this analogue version:
Rest a ruler on a pencil (the pivot) to make a real balance.
Put equal coins on one side, a certain number of marks from the centre.
Work out where to place your coins on the other side so it stays level: coins × distance equal on both sides.
Check it by placing them and seeing if it balances.
If you like Balance the Scale, these activities work similar skills:
On a seesaw, the heavier person moves towards the centre and the lighter one away to balance. Live lever physics.
Build a hanging mobile with threads and objects: each arm must balance moments. Craft and physics together.
A classic two-pan balance shows the equilibrium of weights directly.
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