Engineering Statics - Numbas at mathcentre.ac.uk

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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 Method of joints: cantilever truss 1 week, 5 days ago

Saved a checkpoint:

before some edits

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William Haynes on Moment of inertia: 2 channels and 2 plates 2 weeks, 3 days ago

Saved a checkpoint:

pre simplification of units

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William Haynes on Truss: zero force members 1 month, 1 week ago

Saved a checkpoint:

Figured out how to to access the ggb app in the preamble

var v = question.scope;
try{
var app = v.variables.truss.app

Still doesn't work because of misdirected clicks on the ggb diagram.

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William Haynes on Truss: zero force members 1 month, 1 week ago

Saved a checkpoint:

Changed question.signals.on('adviceDisplayed' ... function, so that function can find the applet again to hide zero force members. See var app =

This doesn't seem very robust to me, probably won't work if the page has multiple applets, and this one has a different identifier.

Still doesn't work because of misdirected clicks on the ggb diagram.

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William Haynes on Truss: zero force members 3 months ago

Saved a checkpoint:

Switched to geogebra_applet() instead of using an extension function.

Replaced "choose several from a list" answer part with a custom extension part.

Still doesn't work because of misdirected clicks on the ggb diagram.

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