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Equilibrium of a rigid body: truss | 5 Oct 2023, 3:32 p.m. |
Vector addition by summing scalar components - easy | 29 Aug 2023, 2:32 a.m. |
Chapter 8 Exercises | 1 Aug 2023, 8:39 p.m. |
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Engineering Statics Homework Problems. Problems have dynamic Geogebra diagrams and use the quantities extension.
Project activity
William Haynes on Equilibrium of a rigid body: truss 2 months ago
Saved a checkpoint:
Turned off debug mode (oops), and edited the ggb applet to turn off gridlines and scale.
Jay McCormack on Vector addition by summing scalar components - easy 3 months, 1 week ago
Gave some feedback: Ready to use
Cyril Crua commented on V-M 1: Concentrated forces 7 months ago
Many thanks for these excellent resources. I think there may be an inconsistency in sign convention in this and other beam exercises, as the shear and moment signs don't seem to match those in http://engineeringstatics.org/VM_sign_convention.html
William Haynes published Equivalent Force-couple system: Bracket 7 months, 2 weeks ago
William Haynes commented on 16. Equivalent Systems, Resultants 7 months, 2 weeks ago
Added question: equivalent force couple system on bracket
William Haynes on Equivalent Force-couple system: Bracket 7 months, 2 weeks ago
Gave some feedback: Ready to use
William Haynes created Equivalent Force-couple system: Bracket 8 months ago
William Haynes on Equilibrium of a rigid body: beam and pulley 8 months, 1 week ago
Saved a checkpoint:
Properly italicized variables, reformatted advise.
William Haynes on Equilibrium of a rigid body: truss 8 months, 1 week ago
Saved a checkpoint:
When b=2.8, h=4, B=2, C=5, F=4, E=3, then Ay = 0, but Numbas calculates it as Ay = -1.7763568394002505*10^(-15) and marks 0 wrong, because it calculates percent error to be 100 %
abs(0 - 0.00000000000002)/(0.00000000000002) = 1.
Added precround(Ay,6) in Marking settings to avoid this. I don't know how to fix the root cause.
William Haynes on 13. Equilibrium of Rigid Bodies 8 months, 1 week ago
Saved a checkpoint:
Student reports that when A_y = 0, answer is not marked correct.
William Haynes on Equilibrium of a particle: four forces 8 months, 1 week ago
Gave some feedback: Has some problems
William Haynes on Equilibrium of a particle: four forces 8 months, 2 weeks ago
Saved a checkpoint:
Problem is throwing "undefined is not an object (evaluating 'original_result.states.mark')" when answer is submitted. Resubmitting it works.
William Haynes on Equilibrium of a particle: four forces 8 months, 3 weeks ago
Saved a checkpoint:
No bug, student misinterpreted the question leading to his problem
William Haynes on Equilibrium of a particle: four forces 8 months, 3 weeks ago
Saved a checkpoint:
Bug in marking algorithm reported
William Haynes published Friction: Range of values 1 9 months ago
William Haynes published Friction: Range of values 2 9 months ago
William Haynes on Friction: Range of values 2 9 months ago
Gave some feedback: Ready to use
William Haynes on Friction: Range of values 1 9 months ago
Gave some feedback: Ready to use
William Haynes published Friction: Determine direction of $F_f$ 9 months ago
William Haynes on Friction: Determine direction of $F_f$ 9 months ago
Gave some feedback: Ready to use
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