Center of Mass Simulation

Workspace

Apparatus example

Setup

Understand the calculation

1Masses

2Positions

3Weight

4Average

Mass controls

Orange mass2.0 kg

Blue mass3.0 kg

Purple mass1.0 kg

Edit position

Horizontal position0.25 m

Vertical position0.55 m

Simulation speed1.00×

Center of mass results

Center X0.50 m

Center Y0.48 m

Total mass6.0 kg

Orange contribution0.50 kg·m

Blue contribution2.04 kg·m

Purple contribution0.50 kg·m

Focus and view

Track part

Zoom1.00×

Teacher demo tools

Always show weighted connections Reveal calculation rule

Voice and language

Language

English narrator

Narration speed

Choose a Pakistani, Indian, US, UK, or Australian English narrator.

Embedded Jenny from the USA narration selected.

Ready for your first predictionChapter 1 of 10

Journey progress10%

Predict before the reveal

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Learning journey

Learning objectives

Locate center of mass from masses and positions.
Predict how moving or changing a mass shifts the center.
Recognize centers inside material and in empty space.
Connect center of mass with system motion and stability.

Key concepts

Weighted position: each location counts in proportion to its mass.

Two dimensions: horizontal and vertical averages are calculated separately.

Uniform symmetry: the center matches the geometric center.

Suggested experiments

Make the blue mass six times heavier and drag it around.
Place two equal masses at opposite corners.
Open the ring example and locate its center in empty space.
Lean the person until the vertical line leaves the support base.

Questions for exploration

Can center of mass be outside an object? What internal motions keep a system center fixed?

Seven-question check

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