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Moment of a Force: using the definition of a moment	19 Feb 2026, 8:25 p.m.
Opposing moments using Verignon's theorem	19 Feb 2026, 1:52 p.m.
Moment Balance: Hoist a pole	17 Feb 2026, 5:20 p.m.
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Engineering Statics Homework Problems. Problems have dynamic Geogebra diagrams and use the quantities extension.

Many are included in Engineering Statics: Open and Interactive, a free, online textbook.

Project activity

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

Restored variable to units, because that wasn't the issue. This version contains debugging code.

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William Haynes on Parallel Axis Theorem: semi and quarter circles 3 years, 9 months ago

Gave some feedback: Ready to use

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William Haynes on Parallel Axis Theorem: semi and quarter circles 3 years, 9 months ago

Saved a checkpoint:

Fixed error calculating centroid of semi-circle

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William Haynes on Parallel Axis Theorem: semi and quarter circles 3 years, 9 months ago

Saved a checkpoint:

Bug reported on finding Iy for semicircle when diameter is vertical.

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William Haynes on Parallel Axis Theorem: semi and quarter circles 3 years, 9 months ago

Gave some feedback: Has some problems

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

changed variable units to unitz, because this is already defined.

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

Fixed the geogebra_applet() parameters to call the scaling functions. Issue was geogebra accepts abs() but not Abs()

The geogebra_applet() function is called directly in the statement, and the diagram resumes.

The geogebra_applet() is also called and stored in a variable ggb_diagram to be used by the marking algorithm.

The custom marking algorithm fails on 'evaluating variable right_sign' after resume

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

Currently using the applet variable. doesn't resume, but marking works.

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William Haynes on V-M 5a: Arbitrary parabolic loading 3 years, 9 months ago

Saved a checkpoint:

State prior to testing. Uses a variable callling a javascript function.

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

Currently using the javascript function

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William Haynes on V-M 5: Symmetric parabolic loading 3 years, 9 months ago

Saved a checkpoint:

This demos the problem. Three methods of loading a ggb applet compared.

1. uses javascript function Most complicated method, but reloads and can call click script to rescale

2. Defines a variable. Doesnt reload, can't call click script to rescale

3. directly loads geogebra_applet() Reloads, but can't call click scripts or get values from the applet

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