Principle of moments simulator

Put two masses on a see-saw and move them to see the clockwise and anticlockwise moments, and find where to place a mass to balance it.

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Questions students ask

What is the principle of moments?

For an object in equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments.

How do you calculate a moment?

Moment = force × perpendicular distance from the pivot, in newton metres (N m).

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